Abstract
This paper discusses a typical job-shop control policy of a periodic type in the case where fixed switching costs are assumed when two processing types are switched from each other. First, the net reward (=price-cost) per unit time is represented by an embedded approach. Second, the problem of maximizing it with respect to two selection criteria and two switching levels are solved by using Tijms' algorithm (1980). Finally, by a numerical consideration, it is showed that the monotone contol policy would not be necessarily optimal.
