In Ishpeming Supervisory Employees' Chapter of Local 128 v. Ishpeming, 155 Mich. App. 501; 400 N.W.2d 661 (1986), the Court held that although the decision of an employer to eliminate jobs pursuant to a reorganization plan was within the scope of management prerogative and a permissive subject of bargaining, the effect of that decision, such as the ensuing determination of which specific employees to lay off, was a mandatory subject over which the union could bargain. Id. at 511.