What is the test for a university to grant tenure to a professor?

It is for these reasons that courts have been reluctant to review the merits of a tenure decision (Zahorik v. Cornell Univ., supra, 729 F.2d at p. 93), and have concluded that universities should be "free to establish departmental priorities, to set their own required levels of academic potential and achievement and to act upon the good faith judgments of their departmental faculties or reviewing authorities." (Id. at p. 94.)