In 3 FLRA No. 119 the Authority defined this right to include discretion "to supervise and guide [employees] . . . in the performance of their duties on the job." In NTEU v. FLRA, 793 F.2d 371 (DC Cir. 1986), the court held, among other things, that the right to direct did not encompass the right to reward. The right to direct, by itself, rarely is used as the basis for finding a proposal nonnegotiable. However, when combined with the right to assign work, it is the basis for finding proposals establishing performance standards nonnegotiable. See, e.g., 49 FLRA No. 25.