consistent with the respective rights of the parties.” Sign and Pictorial Union Local 1175 v. NLRB, 419 F.2d 726, 731 (D.C.Cir.1969). Section 8(d) provides, however, that the obligation to bargain in good faith “does not compel either party to agree to a proposal or require the making of a concession.” 29 U.S.C. § 158(d). Thus, the Act does not require any party “to yield any position fairly maintained; ‘firmness of a bargaining position does not constitute bad faith.’ ” 419 F.2d at 731 (internal citation omitted). The Union argues that the Board’s finding of an impasse should nevertheless be reversed for four reasons. First, the Union alleges the Board did not conduct the sort of intensive factual inquiry it was obliged to make. See Taft Broadcasting Co., 163 N.L.R.B. 475, 478 (1967) (<HOLDING>), enforced, American Fed’n of Television &
holding that the excusable neglect inquiry is at bottom an equitable one that should be made by considering the danger of prejudice to the nonmoving party the length of the delay and its potential impact upon judicial proceedings the reason for the delay including whether it was in the reasonable control of the movant and whether the movant acted in good faith  recognizing that the primary issue to be considered in whether the representative parties will fairly and adequately protect the interest of the class is a determination of whether any antagonism exists between the interests of the plaintiffs and those of the remainder of the class recognizing that the law of the shop includes the understanding of the parties holding that whether impasse exists rests upon factintensive inquiry into the bargaining history the good faith of the negotiating parties the length of negotiations the importance of the issues about which there is disagreement and the contemporaneous understanding of the parties as to the state of negotiations holding that where the parties contemplate the formal execution of a final agreement there is a strong inference that the parties  do not intend to be bound by earlier negotiations or agreements until the final terms are settled 