OPINION OF THE COURT
This appeal is from the grant of injunctive relief and liability findings in a wide-ranging employment discrimination class action. We conclude that: (1) the same period of limitations applies in § 1981 claims as in those under § 1983; (2) class representatives who were not discriminated against in initial work assignments may not represent those who were; (3) on remand, consideration should be given to appointment of an appropriate representative and possible reinstatement of findings; (4) the unions violated Title VII and § 1981 by failing to assert racial bias as grievances; (5) the limitations period for a Title VII charge against a union begins only after it is named in an EEOC proceeding and not on the date that a charge is brought against the employer alone in a state proceeding; (6) a finding of discrimination in denying incentive pay was clearly erroneous where the evidence demonstrates the action was taken solely on economic grounds; and (7) other findings of discrimination by the district court were not clearly erroneous. Accordingly, we affirm, reverse, and remand in part.
After a lengthy bench trial, the district judge found for plaintiffs on several counts alleging discrimination in employment, and therefore entered a remedial order, reserving assessment of damages for future proceedings. On the other counts, the court concluded that the evidence was inadequate to support the plaintiffs’ claims and entered judgment for defendants. Defendants appeal the orders adverse to them.1
In 1973, class action plaintiffs filed this massive suit on behalf of current and past employees of the Lukens Steel Company, alleging violations of 42 U.S.C. § 1981 and Title VII of the Civil Rights Act of 1964, 42 U.S.C. § 2000e et seq. Plaintiffs sought both injunctive relief and damages.
Defendant Lukens is an independent steel producing company with its principal facility in Coatesville, Pennsylvania. Since 1966, its work force has ranged between approximately 4200 and 5300 employees; of these the hourly employees numbered between 2600 and 3900. From 1967 to 1978, the percentage of black employees in the hourly work force varied between 21.8 and 24.1. Lukens’ hourly employees had been represented by Locals 1165 and 2295 of the United Steelworkers of America, and the unions are listed as defendants together with the company.
The district court observed that work at Lukens requires skills which are unique to its specialized products. With a few limited exceptions, the “majority of the Lukens hourly work force start from scratch, and are trained on the job.” Partially as a consequence of the need for highly specific skills, the company has a general policy of promoting from within its workforce. The district court found that to some extent *117current disparaties between white and black employees are a reflection of historical discrimination existing well before the statutory limitations period applicable in this lawsuit.
Plaintiffs developed their case by a combination of statistical and anecdotal evidence. After the compilation of an extensive record, the court found evidence of discriminatory practices by the company in the following categories:
1. Initial job assignments to higher paying craft jobs were skewed in favor of whites. Blacks also were assigned in higher percentages than whites to “pool” positions, which had seniority provisions inferior to those in the “subdivisions.”
2. Evidence focusing on transfers to more desirable craft positions demonstrated that whites were favored over blacks by a substantial margin.
3. Incentive pay was denied to workers in the predominantly black crews in the Pit Subdivision, although it was given to other specialized crews composed mainly of whites.
4. Lukens discriminated against black workers by discharging a higher percentage of black employees during their probationary period.
5. The company discriminated against blacks in denying them promotion to salaried positions in management.
6. Lukens tolerated harassment of black employees by whites and failed to take appropriate steps to curb such behavior, thereby encouraging workers to believe such conduct would go unpunished.
The district court also determined that the unions were guilty of discriminatory practices in:
1. Failing to challenge discriminatory discharges of probationary employees.
2. Failing and refusing to assert instances of racial discrimination as grievances.
3. Tolerating and tacitly encouraging racial harassment.
The court further found that plaintiffs had failed to present adequate proof of discrimination in the following areas:
1. The seniority system.
2. Manning of the new Strand-east facility (with the exception of class representative Ramon L. Middleton).
3. Shift assignments, including Sundays and holiday work, as well as overtime pay.
4. Discipline (excluding discrimination in discharge of probationary employees).
5. Awards for employee suggestions for improvement in plant operation.
6. Processing grievances by the unions insofar as the complaints centered on the number of grievances which the locals presented initially and pursued through arbitration. In addition, the lower rate of successful outcomes for black employees’ grievances did not show racial discrimination.
The court also directed individual relief for class representatives Goodman, Win-field, Jones, Middleton, and Dantzler, but denied the individual claims of Dock L. Meeks, and John R. Hicks III.
The court issued orders against the company and the unions enjoining racial discrimination in the specific areas in which violations of Title VII and § 1981 had been found and directing certain remedial measures. Notice to class members was ordered, and a tentative trial date was set for the individual claims.
Both the company and the unions have appealed the various findings against them, challenging both legal and factual determinations made by the district court. Plaintiffs have not appealed the rulings on which they or the class were unsuccessful.
I.
THE STATUTE OF LIMITATIONS FOR SECTION 1981 CLAIMS
Because there is no specified federal statute of limitations applicable to § 1981 *118cases, the district court was required to use the state limitations period most analogous to the civil rights cause of action. Johnson v. Railway Express Agency, 421 U.S. 454, 95 S.Ct. 1716, 44 L.Ed.2d 295 (1975). In a Memorandum Opinion issued on June 16, 1975, the district court concluded that the appropriate period was the six years set forth in Pa.Stat.Ann. tit. 12, § 31, rather than the two year period “for injury wrongfully done to the person” as set out in Pa.Stat.Ann. tit. 12, § 34.
In this determination, the district judge anticipated our decision some two years later in Meyers v. Pennypack Woods Home Ownership Ass’n., 559 F.2d 894 (3d Cir.1977), where we applied the six year general statute of limitations in a housing discrimination case brought under sections 1981 and 1982. See also Davis v. United States Steel Supply, 581 F.2d 335 (3d Cir.1978) (six year statute of limitations applicable to § 1981 employment discrimination claim).
Although the district judge was correct in forecasting that we would adopt a six year limitation period in an employment case, his prescience, like ours, was limited. Neither he, nor this court, foresaw the Supreme Court’s ruling that all § 1983 cases should be governed by a uniform statute of limitations — that provided by the states for personal injury. Wilson v. Garcia, — U.S. —, 105 S.Ct. 1938, 85 L.Ed.2d 254 (1985). That ruling requires us to reexamine our earlier decisions on the appropriate statute of limitations in Civil Rights cases.
In Polite v. Diehl, 507 F.2d 119 (3d Cir.1974) (in banc), we discarded the notion of applying a single limitations period to all § 1983 cases and chose instead to look to the relief sought and the particular injury alleged. A claim alleging bodily injury was governed by the two year Pennsylvania statute but one which was more akin to a contract action came under the six year limitation. Hence, under Polite v. Diehl differing statutes of limitations would be applied to a variety of claims in one suit.
Although the court discussed only the § 1983 claims, it noted that plaintiff did formulate causes of action under § 1981. 507 F.2d at 121, n. 2. In any event, the Polite rationale of looking to the facts in each case and then searching for the most analogous state statute was followed in § 1981 cases, as well as those brought under § 1983. See Davis v. United States Steel, 581 F.2d at 338, 341 n. 8; Meyers v. Pennypack Woods Home Ownership Ass’n., 559 F.2d at 903 n. 27.
We later determined that the six year statute of limitations applied in § 1983 claims of (1) sex discrimination in employment, Knoll v. Springfield Township School Dist., 699 F.2d 137 (3d Cir.1983), vacated and remanded, — U.S. —, 105 S.Ct. 2065, 85 L.Ed.2d 275 (1985), on remand 763 F.2d 584 (3d Cir.1985); (2) termination of employment without due process, Perri v. Aytch, 724 F.2d 362 (3d Cir.1983); (3) discharge from employment in violation of the First Amendment, Fitzgerald v. Larson, 741 F.2d 32 (3d Cir.1984); and (4) termination of employment contract for exercise of First Amendment rights, Skehan v. Trustees of Bloomsburg State College, 590 F.2d 470 (3d Cir.1978).
Wilson v. Garcia completely undermined the rationale we employed in Polite as we were quick to recognize. Smith v. City of Pittsburgh, 764 F.2d 188 (3d Cir.1985), reviewed our earlier decisions in light of Wilson and applied Pennsylvania’s two year statute of limitations for personal injuries to a § 1983 claim of employment termination without due process. In view of the previous unsettled law in this and other circuits, in Smith we also determined that Wilson v. Garcia should be applied retroactively.
Had the case at hand been brought under § 1983 rather than § 1981, the statute of limitations question would be answered by Wilson. This case, however, involves discrimination in private employment to which § 1983 does not apply, and therefore the issue is whether the same statute of limitations used under § 1983 should also apply to § 1981.
*119The Wilson v. Garcia analysis begins with a reference to 42 U.S.C. § 1988, which determines the “rules of decision applicable to Civil Rights claims.” Because no federal statute of limitations has been provided for such claims, § 1988 approves the use of state law to provide the appropriate rule. The reference to state law, however, occurs only after analysis of the claim using federal standards. In characterizing § 1983 claims for statute of limitations purposes, the court must consider the elements of the cause of action and Congress’ purpose in providing it. Wilson, — U.S. at —, 105 S.Ct. at 1493.
In deciding the issue presented here, we find it most significant that § 1988 applies not only to § 1983 but to § 1981 and the other reconstruction Civil Rights Acts as well. Section 1988 by its terms applies to “the jurisdiction in civil and criminal matters conferred on the district courts by the provisions of this Title, and of Title ‘Civil Rights,’ and of Title ‘Crimes,’ for the protection of all persons in the United States in their civil rights.”
In this context, we do not consider relevant that § 1981 was originally enacted in 1866, reenacted in 1870, and later included in the 1874 codification, while § 1983 was the subject of separate legislation in 1871. See Runyon v. McCrary, 427 U.S. 160, 168 n. 8, 96 S.Ct. 2586, 2593 n. 8, 49 L.Ed.2d 415 (1976); Mahone v. Waddle, 564 F.2d 1018, 1030-31 (3d Cir.1977). Both sections are to be analyzed under the broad provision of § 1988, which is “a directive to select, in each state, the one most appropriate statute of limitations.” Wilson, — U.S. at —, 105 S.Ct. at 1947. In this choice, we should be guided by “federal interests in uniformity, certainty, and the minimization of unnecessary litigation” over the limitations period as well as by the nature of the federal Civil Rights remedy, and the prevention of potential state discrimination against it.
In concluding that state statutes for personal injury were the most appropriate for use in § 1983 cases, the Supreme Court believed that the enacting Congress viewed civil rights actions as analogous to state tort claims. In this connection, one might argue, as does the dissent, that since § 1981 on “its face relates primarily to racial discrimination in the making and enforcement of contracts,” Johnson v. Railway Express Agency, Inc., 421 U.S. 454, 459, 95 S.Ct. 1716, 1720, 44 L.Ed.2d 295 (1975), the state statute of limitations applying to suits for breach of contract is the most appropriate one. See Wilson v. Sharon Steel Corp., 549 F.2d 276, 280 (3d Cir.1977).
We are not persuaded by that argument because it does not recognize the broad sweep of § 1981, see Mahone v. Waddle, nor is it consistent with the fundamental reasons underlying Wilson v. Garcia. There, the Court emphasized § 1983’s derivation from the Fourteenth Amendment, which recognizes the “equal status of every person;” that all persons shall be accorded the full privileges of citizenship; and that no person should be deprived of life, liberty or property “without due process.” Wilson, — U.S. at —, 105 S.Ct. at 1948. As the Court said, “[a] violation of that command is an injury to the individual rights of the person.” Id.
Those concepts apply equally to actions under § 1981. Present day § 1981’s predecessor was founded on the Thirteenth Amendment that allows “neither slavery nor involuntary servitude” to exist any longer. It is difficult to imagine a more fundamental injury to the individual rights of the person than the evil that comes within the scope of that amendment. Also of significance is that in Runyon v. McCrary, the Supreme Court accepted the use of a state’s personal injury statute of limitations in a § 1981 case. 427 U.S. at 180-82, 96 S.Ct. at 2599-2600.
Moreover, in its reenactment of § 1981 in 1870, Congress looked to constitutional authority embodied in the Fourteenth, as well as in the Thirteenth Amendment. Croker v. Boeing Company, 662 F.2d 975, 987 (3d Cir.1981) (in banc); see also General Building Contractors Ass’n., Inc. v. Pennsylvania, 458 U.S. 375, 102 S.Ct. 3141, 73 *120L.Ed.2d 835 (1982). Consequently, much of the body of law developed under the Fourteenth Amendment is helpful in the interpretation of § 1981.
A substantial overlap exists in the types of claims brought under sections 1981 and 1983. A plaintiff may press an allegation of intentional racial discrimination under either section when state action is present. A § 1983 case of intentional racial discrimination in employment filed in Pennsylvania against a state agency is governed by the two year personal injury statute. See Knoll v. Springfield Township School Dist., 763 F.2d 584 (3d Cir.1985). Application of Pennsylvania’s six year statute of limitations where the same claim is brought under § 1981 would lead to a bizarre result.
Our first opinion in Knoll, 699 F.2d 137, 144, expressed our doubt that Congress would have intended a differing limitations period depending on whether the defendant was a state official sued under § 1983 or a private individual in a § 1981 action. The same conclusion is appropriate where the identical claim may be brought under either of these Reconstruction Civil Rights Acts. See Jackson v. City of Bloomfield, 731 F.2d 652 (10th Cir.1984). Therefore, because employment discrimination cases under § 1983, regardless of their affinity to contractual actions, are now governed by the personal injury statute of limitations, and because the same considerations which led to that judgment are also present in § 1981 cases, we conclude that the same limitations period applies.2
In taking this position, we are in agreement with Supreme Court in Wilson that the personal injury limitation period is unlikely to be fixed in such a way as to discriminate against federal Civil Rights claims. In addition, the factors characterized as “practical considerations” by Justice O’Connor’s dissent in Wilson — which include the desirability of uniformity, certainty, and minimization of litigation prior to reaching the merits — are best served by applying the same statute of limitations to all of the Reconstruction Civil Rights cases.3
As we noted earlier, the reasoning employed by the Supreme Court in Wilson is inconsistent with the Polite approach as used in Davis and Pennypack Woods. This court has consistently held that one panel may not overrule an earlier panel’s decision. See Third Circuit Internal Operating Procedure VIII C. However, we have recognized that this principle must yield when a panel opinion is in conflict with an intervening Supreme Court precedent. “Where, however, a holding of this Court is overruled or rejected by the Supreme Court, IOP 8c does not require in banc consideration to align this court's jurisprudence with Supreme Court teaching.” Rubin v. Buckman, 727 F.2d 71, 74 (3d Cir.1984) (Garth, J. concurring). See also West v. Keve, 721 F.2d 91, 93 (3d Cir.1983); Geraghty v. United States Parole Commission, 719 F.2d 1199, 1209 (3d Cir.1983). The rationale used in Davis cannot co-exist with Wilson, and accordingly does not bind us here.
We hold, therefore, that the personal injury statute of limitations of the forum state supplies the most analogous statute of limitations for actions brought under § 1981. For the reasons set forth in Smith v. City of Pittsburgh, we also conclude that our decision should be given the customary retroactive effect. See Fitzgerald v. Larson, 769 F.2d 160 (3d Cir.1985).
*121Our holding affects some but not all of the findings made by the district court. Plaintiffs contend that the two year statute of limitations would not change the district court’s decree because it was based on violations of Title VII as well as § 1981.4 However, because the court did not consider the facts separately under § 1981 and Title VII, we conclude this lack of discrete analysis requires a partial remand.
As noted in Croker v. Boeing, 662 F.2d 975 (3d Cir.1981), § 1981 liability is not co-extensive with that under Title VII, and the remedies provided under the two statutes are “separate, distinct, and independent.” See Johnson v. Railway Express Agency. In the absence of a specific finding fixing liability under each statute, we are unable to say whether application of the two year statute of limitations would result in a difference in the court’s decree on two of its liability determinations. It is conceivable, for example, that events within the six year statute of limitations used for the § 1981 claims might have been considered by the court in finding liability under Title VII beyond its limitations period.
In finding discrimination in transfers to salaried positions, the district court relied heavily on the low percentage of blacks promoted to foreman jobs in the years 1969 and 1970 — between three and four years before the suit was filed. The court found that the evidence “overwhelmingly establishes that Lukens discriminated in the selection of foremen until at least 1971.” 580 F.Supp. at 1145. For the years 1971 through 1978, however, approximately 26% of the foreman promotions were given to blacks — not substantially different from their 29% representation in the work force during those years.
The record contains other anecdotal and statistical evidence on this point which should be evaluated by the district judge in the first instance. We are mindful that a finding of class-wide violation is supported only when the evidence shows that discrimination was' the company’s standard operating procedure, rather than something which occurred only in a few isolated incidents. See International Bhd. of Teamsters v. United States, 431 U.S. 324, 97 S.Ct. 1843, 52 L.Ed.2d 396 (1977). In such a situation, the trial judge’s appraisal is particularly important.
Similarly, the district court’s finding that the company tolerated racial harassment within the work force must be reevaluated on remand. The court stated that it had considered more than 100 incidents or practices, many of which “predated the limitation period” and about 35 of which “occurred within the limitations period or shortly before — e.g. ‘in the late 1960s’ or ‘between 1965 and 1970’.” 580 F.Supp. at 1147. The court recognized the critical inquiry as “assessing the conditions which prevailed during the limitations period.” Id.
Some of the instances described in detail by the district judge occurred before 1971 and some thereafter. We are unable to determine from the record what effect the application of the two year statute of limitations for the § 1981 claims would have on the district court’s conclusion with respect to the harassment charge. Consequently, it too will require reexamination by the trial court.
We have surveyed the findings on the other issues and conclude that they would not be affected by the two year limitations period. Naturally, in the portion of the case remaining to be tried for assessment of individual damages, the two year statute would apply.
II.
CLASS CERTIFICATION AND CLASS REPRESENTATIVES
A.
A second major issue presented in this case is that of class representation. In this *122area, too, subsequent decisional law requires review of the district court’s ruling in a somewhat different light than that which prevailed at the time the court acted.
In a Memorandum of June 16, 1975, the district court certified a class of “all black persons employed by the defendant Lukens Steel Company at any time on or after June 14, 1967.” This class includes persons whose employment was within the six year statute of limitations for § 1981 applied by the district court. To that extent, the class definition must be narrowed.
A review of the class allegations in the complaint and the court’s certification order shows that the suit was conceived as a broad, “across the board” attack on racial discrimination at Lukens. As class representatives, the court approved Charles Goodman, Ramon L. Middleton, Romulus C. Jones, Jr., Lymas L. Winfield, Dock Meeks, David Dantzler, and John R. Hicks, III. Each of these plaintiffs asserted specific claims of discrimination practiced against them by the company and, in several instances, by the unions as well.
Because of the nature of the claims, the court concluded that any ruling on the appropriateness of damages was premature, and therefore certified the class under Fed.R.Civ.P. 23(b)(2). See Kyriazi v. Western Electric Co., 647 F.2d. 388 (3d Cir.1981). Possible definition of a class under Rule 23(b)(3) for assessment of damages was reserved. After making its liability determinations, the court directed counsel to prepare a proposed form of notice to class members.
On appeal, defendants contend that the district court erred in allowing the individual plaintiffs who asserted injury from specific discriminatory practices to represent a broad class alleging violations beyond those of the named individuals.
Initially, we observe that contrary to the defendants’ contentions, the issue here is one of compliance with the provisions of Rule 23, not one of Article III standing. Each of the named plaintiffs has presented claims of injury to himself and has alleged facts which present a case or controversy under the Constitution. Cf. O’Shea v. Littleton, 414 U.S. 488, 494, 94 S.Ct. 669, 675, 38 L.Ed.2d 674 (1974) (“If none of the named plaintiffs purporting to represent a class establishes the requisite of a case or controversy with the defendants, none may seek relief on behalf of himself or any other member of the class.”).
The thrust of the defendants’ challenge is that the injuries to the named plaintiffs are in many instances not the same as those advanced on behalf of the class. In essence, defendants contend that the allegations of the named plaintiffs do not present “questions of law or fact common to the class” and that their “claims ... are [not] typical of the claims ... of the class” as required by Rule 23(a)(2) and (3). For this reason, we need only consider whether the named plaintiffs meet the requirements of Rule 23.
The expansive “across the board” class action attack on employment discrimination gained currency in a series of cases typified by Johnson v. Georgia Highway Exp. Inc., 417 F.2d 1122 (5th Cir.1969), and Payne v. Travenol Lab., Inc., 565 F.2d 895 (5th Cir.1978). See also Wetzel v. Liberty Mut. Ins. Co., 508 F.2d 239 (3d Cir.1975); Mack v. General Elec. Co., 329 F.Supp. 72 (E.D.Pa.1971); Rutherglen, Title VII Class Actions, 47 U.Chi.L.Rev. 688 (1980). In General Telephone Co. of the Southwest v. Falcon, 457 U.S. 147, 102 S.Ct. 2364, 72 L.Ed.2d 740 (1982), however, the Supreme Court pulled in the reins by insisting on actual, not presumed, compliance with the typicality and commonality provisions of Rule 23.
The Supreme Court pointed out that a named plaintiff’s proof of his personal claim would not necessarily establish that the discriminatory practice was pervasive or was reflected in other employment activities. As the Court said, “[i]f one allegation of specific discriminatory treatment were sufficient to support an across-the-board attack, every Title VII case would be a potential company wide class action. We find nothing in the statute to indicate that Congress intended to authorize such a *123wholesale expansion of class-action litigation.” Id. at 159, 102 S.Ct. at 2371.
In Falcon, the named plaintiff alleged that he had been denied a promotion because he was a Mexiean-American. The Court determined that he could hot represent a class of Mexiean-Americans attacking discrimination in hiring. The Court cited East Texas Motor Freight System, Inc. v. Rodriguez, 431 U.S. 395, 97 S.Ct. 1891, 52 L.Ed.2d 453 (1977), in which named plaintiffs who were not qualified as over-the-road drivers could not represent a class of qualified drivers who complained of discrimination. Because the named plaintiffs “could have suffered no injury as a result of the alleged discriminatory practices, ... they were, therefore, simply not eligible to represent a class of persons who did allegedly suffer injury.” 431 U.S. at 403-04, 97 S.Ct. at 1897.
Scott v. University of Delaware, 601 F.2d 76 (3d Cir.1979), presented a similar problem. There, a former faculty member whose contract was not renewed alleged that he was a victim of racial discrimination and sued under sections 1981 and 1983 as well as Title VII. He sought to represent a subclass of applicants seeking initial faculty appointments who were also allegedly victimized by racial considerations. The district court entered judgment on the merits for the defendant on both the individual and class claims.
We determined that the plaintiff could not represent a class contesting the university’s hiring procedures. Clearly, he had suffered no harm from discrimination in hiring practices since he had initially obtained a position. In that situation, absent class members might be harmed by the preclusive effect of the district court’s judgment. Therefore, we concluded that the court had a duty to “consider carefully the requirement of fair and adequate proteetion” to the absent class members, despite the lack of a cross appeal of the class certification ruling by the defendant. Scott, 601 F.2d at 83.5
As is clear from Scott, assessment of the adequacy of representation initially must focus on any potential conflicts of interest between the named individuals and the class. On this record, we find no divergence that would impair the incentive of the named plaintiffs in vigorously prosecuting all aspects of the claims that are otherwise found to be adequately represented. Scott v. University of Delaware, 601 F.2d at 85. See Rutherglen, Notice, Scope, and Preclusion in Title VII Class Actions, 69 Va.L.Rev. 11 (1983).6 The defendants have raised additional allegations of error in class certification, however, which must also be addressed.
The class representatives alleged a variety of instances of discrimination by the company and the unions in various employment practices, covering most of the claims presented by the class. Included were promotion (Middleton, Winfield, Jones), incentive pay (Meeks), discharge (Goodman, Hicks, Dantzler), harassment (Meeks), inadequate union representation (Middleton, Dantzler, Meeks), testing (Meeks), seniority system (Meeks), discipline (Dantzler), and manning of the new Strand-Cast facility (Middleton).
Defendants contend that in a number of areas the class representatives’ specific allegations are distinct from those of the class as a whole. For example, none of the named plaintiffs were discharged during the probationary period. Nonetheless, some do allege that racial bias resulted in their discharge. Even though the alleged discrimination occurred after their probationary period had passed, we conclude that the typicality of their claims makes them adequate representatives under Rule 23.
*124The defendants’ contentions are not completely without merit however. Even under an expansive view of representation, discrete areas of alleged bias exist in which the record does not demonstrate the required commonality and typicality of the class complaints with those of the individual representatives. A footnote in Falcon suggests that “[significant proof that an employer operated under a general policy of discrimination conceivably could justify” a broad class if the bias manifested itself “in the same general fashion, such as through entirely subjective decisionmaking processes.” 457 U.S. at 159 n. 15, 102 S.Ct. at 2371 n. 15. We do not regard the case at hand as meeting those requirements. The findings of the district court, which rejected some of the plaintiffs’ claims, belie the existence of a “general policy” of discrimination and plaintiffs did not produce “significant proof” of such a scheme.
The district court found discrimination in the initial assignment of Lukens’ newly-hired employees. To be actionable, the discriminatory practice must exist during the applicable limitations period. All of the named plaintiffs, however, were originally hired outside the limitations period, and therefore, none have a viable complaint about discrimination in initial assignment. Thus, no representative adequately represents the class in this particular claim. See Hill v. AT & T Technologies, Inc., 731 F.2d 175 (4th Cir.1984).7
Because in this instance a qualified class representatives is lacking, the findings applicable to it must be vacated. Economical use of judicial resources, however, requires that some thought be given to whether the work of district court and counsel with respect to this claim may yet be salvaged.
B.
We begin by acknowledging the realities of class suits, a sometimes neglected approach in this field. In a massive class action such as the one at hand, it is counsel for the class who has the laboring oar. The class representatives furnish the factual basis to invoke the jurisdiction of the court and provide the outline of the controversy, but the lawyers shape the claims for adjudication by the compilation of factual and expert testimony and the presentation of statistical and documentary evidence.
That work was performed in this case by thoroughly competent counsel as to the claims in which the court found for plaintiffs as well as those where it ruled for defendants. We do not prejudge the issue but merely note the distinct possibility that the evidence presented would not have varied one iota had a qualified representative for each claim been present from the inception of the suit. If that possibility is indeed the fact, then another suit filed on such a claim by a newly qualified class representative would produce a trial that would simply repeat the previous one. That result would yield no diseernable benefit to anyone but would generate substantial loss in time for court, counsel, and parties.8
To obviate such unnecessary duplication, on remand the district court should explore the possibility of intervention by qualified class representatives, followed by a proceeding to determine if the findings previously reached may be reinstated. That solution was suggested by the Court of Appeals for the Fourth Circuit in Hill v. Western Elec. Co., Inc., 672 F.2d 381 (4th Cir.1982). See Note, Reinstating Vacated Findings in Employment Discrimination Class Actions: Reconciling General Telephone Co. v. Falcon with Hill v. Western Electric Co., 1983 Duke L.J. 821.
*125Intervention is still permissible even at this stage, see United Airlines, Inc. v. McDonald, 432 U.S. 385, 97 S.Ct. 2464, 53 L.Ed.2d 423 (1977), and a class action determination in some instances may be made even after appeal. McLaughlin v. Wohlgemuth, 535 F.2d 251, 252 n. 2 (3d Cir.1976).
As the Hill court observed, practical fairness should guide the district court in evaluating the propriety of intervention. For example, a witness who testified about a particular practice and who otherwise meets the necessary test may be a likely representative. See Lilly v. Harris-Teeter Supermarket, 720 F.2d 326 (4th Cir.1983). If, however, no proper class representative is available, then that claim must be dismissed as to the class. See Scott v. City of Anniston, Alabama, 682 F.2d 1353 (11th Cir.1982); Carpenter v. Stephen F. Austin State University, 706 F.2d 608 (5th Cir.1983) . Cf. Vuyanich v. Republic Nat’l Bank of Dallas, 723 F.2d 1195 (5th Cir.1984) .
Assuming that a proper class representative is appointed, the next step would be to determine whether the findings from the original trial may be reinstated. In reaching a decision on this question, the district court must consider whether either side will be prejudiced. This will require determination of whether those findings would have been different had the new class representative been on board at that time. An intervenor or new class representative seeking to salvage the original findings has the burden of proving that the prior defect in class representation did not affect those determinations. In the event of such proof, the previous findings may be reinstated.
On remand, the district court has the benefit of hindsight. As the court of appeals said in the Hill case, “[t]o the extent inadequacy is based solely upon lack of sufficient identity of interest, any presumed adverse effect on the merits stemming from this may in fact be utterly belied by the outcome.” 672 F.2d at 389. See also Scott v. University of Delaware, 601 F.2d at 87 n. 22. If the results of the original trial were favorable to the class, then there may be no reason to assume that reinstatement would be prejudicial to the class.
The district court also has the responsibility of determining whether it would be unfair to defendants to reinstate the findings. That the net effect is to revive an adverse result is not in itself a sufficient showing of prejudice. Rather, the court should consider whether the defendants’ preparation and tactics would have been different had other class representatives been in place at the earlier trial. In other words, the question is would defendants have conducted the litigation differently in some material way absent the defect in representation in the prior proceeding. See Dickerson v. United States Steel Corp., 582 F.2d 827 (3d Cir.1978). Cf. Mullaney v. Anderson, 342 U.S. 415, 417, 72 S.Ct. 428, 429, 96 L.Ed. 458 (1952) (Joinder of new parties permissible where their earlier presence would not “have in any way affected the course of the litigation”).
We do not limit the district court in its inquiry but only point to a few of the considerations that should be examined.
C.
Plaintiffs contend that the United Political Action Committee — an unincorporated association composed predominantly of black citizens in the vicinity of the Lukens plant, some of whom aré employed by the company — should be permitted to act as a class representative. The record in this case does not contain adequate factual material to justify the committee’s capacity to act as a class representative. See General Telephone Co. of the Southwest v. Falcon.
Accordingly, we conclude that on this record no named plaintiff could adequately represent the class in the claim of racial discrimination in initial work assignments. On remand, the district court may consider the intervention and appointment of appro*126priate class representatives as well as possible reinstatement of the original findings.
III.
CLAIMS AGAINST THE UNIONS
The district court concluded that the evidence did not support the plaintiffs’ claims about racial discrimination in the general handling of grievances by the unions, including references to arbitration. The delay in processing grievances and the decision to abandon those of a less serious nature were, in the court’s view, practices legitimately complained of by both black and white workers. However, the court did find that the unions discriminated against the plaintiff class in violation of both § 1981 and Title VII.
Collective bargaining agreements beginning in 1965 had prohibited the company from discriminating against any employee, probationary or permanent, on racial grounds. Nevertheless, although they knew that blacks were being discharged at a disproportionate rate during the probationary period, the locals failed to file grievances challenging that practice, pursuant to a union policy of not grieving complaints of probationary employees.9
The unions were reluctant to assert racial bias as a basis for a grievance even when they believed that element was implicated. The court found this policy to perpetuate the discriminatory environment and “render the non-discrimination clause in the collective bargaining agreement a dead letter.” 580 F.Supp. at 1160.
The unions argued before the district court that simple inactivity could not make them liable under Title VII or § 1981. The district court rejected that contention, but went on to hold that “the evidence in this case proves far more than mere passivity on the part of the unions.” The court further commented that “[a] union which intentionally avoids asserting discrimination claims, either so as not to antagonize the employer and thus improve its chances of success on other issues, or in deference to the perceived desires of its white membership, is liable under both Title [VII] and § 1981 regardless of” its leadership’s favorable disposition toward blacks. Id. at 1160.
On appeal, the unions repeat their argument that mere passivity should not subject them to liability because such inaction is not within the scope of § 703(c) of Title VII addressing union responsibility. That section of the Act provides in pertinent part that it is an unlawful employment practice for a union:
“(1) to exclude or to expel from its membership, or otherwise to discriminate against, any individual because of his race, color, religion, sex, or national origin; # * * * * *
(3) to cause or attempt to cause an employer to discriminate against an individual in violation of this section.”
42 U.S.C. § 2000e-2(c).
The union argues that passivity does not “cause” the employer to discriminate and faults Macklin v. Spector Freight Systems, Inc., 478 F.2d 979 (D.C.Cir.1973), for holding a union liable without any reference to the text of the statute. Although the Macklin case has been criticized, see Larson, Employment Discrimination, § 44.50, other cases have echoed its premise that there is an affirmative duty on the part of the unions to combat discrimination in the workplace. See, e.g., Bonilla v. Oakland Scavenger Co., 697 F.2d 1297 (9th Cir.1982); Farmer v. ARA Services, Inc., 660 F.2d 1096 (6th Cir.1981); Romero v. Union Pacific R.R., 615 F.2d 1303 (10th Cir.1980); Donnell v. General Motors Corp., 576 F.2d 1292 (8th Cir.1978); Carey v. Greyhound Bus Co., Inc., 500 F.2d 1372 (5th Cir.1974).
In McDonald v. Santa Fe Trail Transp. Co., 427 U.S. 273, 96 S.Ct. 2574, 49 L.Ed.2d *127493 (1976), the plaintiffs contended that disproportionate discipline had been imposed on them because of their race. They alleged that the union “had acquiesced and/or joined in” the employer’s discrimination. The Court did not accept the union’s defense that in representing a number of employees it is sometimes necessary to compromise the grievance of one.
“We reject the argument. The same reasons which prohibit an employer from discriminating on the basis of race among the culpable employees apply equally to the union; and whatever factors the mechanisms of compromise may legitimately take into account in mitigating discipline of some employees, under Title VII race may not be among them.”
427 U.S. at 285, 96 S.Ct. at 2581.
The case against the unions here is stronger than one of mere acquiescence. The district court found that the unions intentionally avoided asserting claims of discrimination. In so doing, the unions violated the duty of fair representation owed to their members. See Vaca v. Sipes, 386 U.S. 171, 87 S.Ct. 903, 17 L.Ed.2d 842 (1967); Steele v. Louisville & Nashville R.R. Co., 323 U.S. 192, 65 S.Ct. 226, 89 L.Ed. 173 (1944); see also, Note, Union Liability for Employer Discrimination, 93 Harv.L.Rev. 702 (1980).
By shirking their responsibility for presenting grievances based on discrimination, the unions also violated the duty to enforce the collective bargaining agreement. See Peterson v. Lehigh Valley Dist. Council, 676 F.2d 81 (3d Cir.1982). The deliberate choice not to process grievances also violated § 703(c)(1) of Title VII because it discriminated against the victims who were entitled to representation. The district court’s finding of intentional discrimination properly supports the claims under § 1981 as well. We therefore find no error in the district court’s assessment of liability against the unions.
IV.
STATUTE OF LIMITATIONS AS TO THE TITLE VII CLAIMS AGAINST THE UNIONS
Plaintiff Hicks filed charges against Lukens before the Pennsylvania Human Rights Commission on December 2, 1971. The unions were not named in that complaint. On January 28, 1972, however, Hicks along with named plaintiffs Goodman, Meeks, and Middleton filed broad charges of discrimination against Lukens, the International Union, and Local 1165 with the EEOC. The Commission deferred these charges to the Pennsylvania Human Relations Commission on February 16, 1972, and filed them on May 7, 1972. Local 2295 was first named in an amended charge filed by plaintiff Meeks on June 13, 1972.
Because the statute allows the state agency sixty days to dispose of a claim, 42 U.S.C. § 2000e-5(c), the earliest that Hicks’ original charge could be considered filed with the EEOC was January 31, 1972. Based on that date, the district court found that the limitation period for Title VII claims against the unions began on April 6, 1971. That determination is correct only if the initial filing in the state Commission against Lukens is construed to include claims against the unions as well.
In Ostapowicz v. Johnson Bronze Co., 541 F.2d 394 (3d Cir.1976), we held that the scope of a Title VII action is defined by the limits of the EEOC investigation which can reasonably be expected to grow out of the charge of discrimination. That case, however, involved only one defendant, and we did not hold that the scope of the investigation could include unnamed parties.
Glus v. G.C. Murphy Co., 629 F.2d 248 (3d Cir.1980), held that charges against an unnamed international union could be adjudicated because the original complaint before the EEOC had named a local union whose interests were the same and the international had received notice. Neither of those two conditions apply here. The charge filed by Hicks was not against a union, but against the employer. We do *128not find the commonality of interest and actual notice which would make Glus applicable. Therefore, no charges were cognizable against the unions until the January 28, 1972 filing with the EEOC.
In Mohasco Corp. v. Silver, 447 U.S. 807, 814 n. 16, 100 S.Ct. 2486, 2491 n. 16, 65 L.Ed.2d 532 (1980), the Court held that “a complainant in a deferral State [as is Pennsylvania] ... need only file his charge within 240 days of the alleged discriminatory employment practice in order to insure that his federal rights will be preserved.” Plaintiffs ask that they be given the benefit of this 240 day rule. That would produce a limitations period commencing June 2, 1971, somewhat longer than that advocated by the unions. Although we can foresee another case in which a plaintiff-might be entitled to a longer period, in light of the plaintiffs’ concession here, we conclude that the June 2 starting date is appropriate.
We do not find a different limitation period applicable to Local 2295. The identity of interest and notice provisions of Glus are applicable in this situation; therefore, Local 2295 will be governed by the same effective limitations date, June 2, 1971.
The correction of the limitations date for Title VII claims against the unions will not affect the injunctive relief directed by the district court. It might, however, make a difference in the assessment of damages, and accordingly we feel obligated to make a ruling on the point.
V.
INCENTIVE PAY FOR THE PIT CREWS
The district court found that the company’s policy of denying incentive pay to workers in the open hearth pits while making it available to other workers amounted to discrimination. The open hearth pit crews were predominantly black. Their assignment was to prepare molds to receive molten metal, pour the metal, and remove the molds after the metal had hardened. At a higher physical elevation in the plant, workers on the melting “floor” placed the raw materials into the furnaces for melting and supervised that process. These predominantly white crews received incentive pay, as did other workers in the Lukens facility.
The court reasoned that “[g]iven the fact that the company paid incentive bonuses to the ‘floor’ personnel, ... [its] refusal to accord the same benefit to the pit personnel had no legitimate justification. I find that this was a clear instance of racial discrimination.” 580 F.Supp. at 1138.
In reviewing factual findings made by a district court, we apply the clearly erroneous standard set out in Fed.R.Civ.P. 52(a). As the Supreme Court stated in Anderson v. City of Bessemer City, — U.S. —, 105 S.Ct. 1504, 84 L.Ed.2d 518 (1985), this standard is used “even when the district court’s findings do not rest on credibility determinations, but are based instead on physical or documentary evidence or inferences from other facts.” Id. at —, 105 S.Ct. at 1512. The Rule clearly requires deference to the findings of the trial judge, but it does not relieve the court of appeals from its responsibility to correct findings of fact when it is left “with a definite and firm conviction that a mistake has been committed.” United States v. United States Gypsum Co., 333 U.S. 364, 395, 68 S.Ct. 525, 542, 92 L.Ed. 746 (1948).
As an appellate court, we have an advantage over the trial judge in that the parties have had ample opportunity after trial to review the record in detail and point out specific references to support their position. Moreover, the attention of the litigants is restricted to a narrow area in which they hope the challenge may be successful. That process differs from the broad gauge approach which is followed in the district court, where the requests for findings are being compiled in the first instance from voluminous testimony and exhibits and without any indication of the trial court’s ultimate rulings. This is particularly true in a case as massive as this one.
After a painstaking review of every record reference to which the parties have cited us, we have come to the conclusion that in this instance, a mistake was made.
It is undisputed that the incentive pay issue was one of long standing which began before the limitations period. Both testimony and documents disclose that the union on a number of occasions had asked the company to grant incentive pay to the pit crew. The employer’s response was consistent — it would include the pit crew in the incentive plan only if the company was *129given the opportunity to reduce the size of the crew. On each occasion, and there were several, when the employer submitted this proposition to the members of the pit crew, they rejected it. Not only did the pit crews turn down the company’s proposal, but the crane crews in the pit — another seniority subdivision — did so as well.
One union official who discussed the company’s proposal with the workers recalled that about equal numbers of black and white workers were present at a meeting to vote on the proposal. Although plaintiffs suggest that other groups receiving incentive pay also had agreements on crew size, testimony reveals that these arrangements were not comparable to those with the pit and crane crews.
Another union witness described the particularly close relationship among the workers in the pit crew. The men consistently presented a united front to the company and were most solicitous of each member’s safety and well being. When one reads the testimony against this background, it is understandable why the pit crew would not sacrifice the jobs of its members in exchange for higher pay for those who would retain their positions.
The evidence is equally clear why the employer insisted on the trade-off. Company officials testified that the pit crews were overmanned and that the facilities of the plant were limited. Any increase in efficiency had to come from a reduction in crew size. In these circumstances, incentive pay would not be economically advantageous to the company because the capacity of the facility had already been reached and increased efficiency by the already overabundant manpower could not result in greater production.
The testimony does not support any inference that denial of incentive pay was racially inspired. The company’s position on a trade-off was consistently maintained and was unrelated to race. That conclusion finds reinforcement in the company’s experience with the die shop workers. Early collective bargaining agreements showed that both the pit crew and die shop group were not included in the incentive pay plan. However, when the die shop employees agreed that the company would be under no restriction as to crew size, they did receive incentive pay.
The record citations to which plaintiffs have referred us do not furnish any basis for concluding that the company’s reason for denying incentive pay was pretextual. Indeed, the weakness on this point in the otherwise vigorous and well-documented plaintiffs’ brief is eloquent in itself.
After our review, we conclude that the finding on incentive pay to the pit crews is clearly erroneous, and on this claim, the judgment of the district court must be reversed.
VI.
LUKENS OTHER CONTENTIONS
In addition to the matters which have been discussed above, Lukens has raised other claims of error. It contends that the trial judge erred by impermissibly shifting the burden of proof to the defendant. We find no merit to this argument. In the introduction to his opinion, the trial judge reviewed the leading cases of Texas Dept. of Community Affairs v. Burdine, 450 U.S. 248, 101 S.Ct. 1089, 67 L.Ed.2d 207 (1981), and McDonnell Douglas Corp. v. Green, 411 U.S. 792, 93 S.Ct. 1817, 36 L.Ed.2d 668 (1973). He stated clearly that the burden of proof was on plaintiffs. We are not persuaded that the casual references in the opinion to which Lukens points should be interpreted as contradicting the earlier unambiguous allocation of the burden of proof.
The court’s opinion similarly displayed a thorough understanding of the difference between disparate impact and disparate treatment cases and of the relevant evidence under each theory. The defendant takes exception to the district judge’s comment that
“One must be careful not to over-categorize in this context. The analytical distinctions ... are of only limited utility. The ultimate questions to be answered are essentially the same in all employment discrimination cases: Has the defendant caused a given employee or group of employees to be discriminated against? ... Is the action or conduct complained of justifiable ... ?”
580 F.Supp. at 1121.
We find no fault with these observations. In Dillon v. Coles, 746 F.2d 998 (3d Cir.1984), we similarly commented on *130excessive preoccupation with the various formulae used in an employment discrimination case and observed that they are simply tools designed to aid in the analysis of evidence. The ultimate question remains whether the defendant has discriminated. The presumptions and shifting burdens are merely an aid — not ends in themselves. When direct evidence is available, problems of proof are no different than in other civil cases. See Trans World Airlines, Inc. v. Thurston, — U.S. —, 105 S.Ct. 613, 622, 83 L.Ed.2d 523 (1985); United States Postal Serv. Bd. of Governors v. Aikens, 460 U.S. 711, 103 S.Ct. 1478, 75 L.Ed.2d 403 (1983); Furnco Constr. Corp. v. Waters, 438 U.S. 567, 577, 98 S.Ct. 2943, 2949, 57 L.Ed.2d 957 (1978). If judges lose sight of the ultimate question, the analysis intended to aid in the process will instead have become a hinderance.
Lukens also argues that the district court misapplied evidence by failing to recognize that a statistical variation in itself does not establish discrimination unless the record also shows the requisite availability of positions and the qualification of the claimants. We do not so read the district court’s opinion. In considering the statistical data presented as part of the plaintiffs’ case, the court demonstrated its recognition of the limits of such evidence and the caution with which it must be viewed. The court noted that to prevail the class was required to prove that “disparate treatment exists and is the defendant's regular and standard operating procedure.” 580 F.Supp. at 1120. In another part of the opinion, the court made clear that it had considered Lukens’ “attempts to show that [the plaintiffs’] comparisons are faulty because of factual dissimilarities.” Id.
We repeat once again that the clearly erroneous rule applies to our review of factual findings, including those based in part on statistical data. Statistical proof in Title VII cases must be evaluated in light of the “surrounding facts and circumstances.” International Bhd. of Teamsters v. United States, 431 U.S. 324, 340, 97 S.Ct. 1843, 1857, 52 L.Ed.2d 396 (1977). In Dothard v. Rawlinson, 433 U.S. 321, 338, 97 S.Ct. 2720, 2731, 53 L.Ed.2d 786 (1977), Justice Rehnquist in his concurring opinion wrote, “[i]t is for the District Court, in the first instance, to determine whether these statistics appear sufficiently probative of the ultimate fact in issue---In making this determination, such statistics are to be considered in light of all other relevant facts and circumstances.” See also Holsey v. Armour & Co., 743 F.2d 199, 215 (4th Cir.1984).
We have reviewed Lukens’ remaining contentions using this standard. We cannot say that the findings made by the district court are clearly erroneous, nor do we find error in the legal guidelines used by the court in reaching these remaining findings. Therefore, the judgment of the district court with respect to the instances of discrimination not previously discussed will be affirmed.
VII.
SUMMARY
1. The district court’s findings that Lukens discriminated in transfers to salary positions and toleration of racial harassment will be vacated and the matters remanded for further consideration in light of our ruling on the appropriate statute of limitations for the § 1981 claims.
2. The district court’s finding in favor of the class with respect to initial assignments will be vacated and remanded for reconsideration in light of our ruling on class representation.
3. The limitations period pertaining to the Title VII claims against the unions shall be adjusted in accordance with the views expressed above.
4. The finding of discrimination in the denial of incentive pay for the pit crews is reversed and judgment shall be entered for the defendant on that claim.
5. In all other respects, the judgment of the district court will be affirmed.