GENERALIZED ORDERING POLICIES WITH GENERAL RANDOM MINIMAL REPAIR COSTS AND RANDOM LEAD TIMES

In this article we consider two generalized ordering policies for a co mplex system with age-dependent minimal repair and general random repa ir costs. Introducing costs due to ordering, repairs, shortage and hol ding, we derive the expected cost per unit time in the long run as a c riterion of optimality and seek the optimum ordering policies by minim izing that cost. We show that, under certain conditions, there exists a finite and unique optimum policy. Various special cases are discusse d. Finally, a numerical example is given.