MARKOV MAINTENANCE MODELS WITH CONTROL OF QUEUE HATOYAMA YUKIO 社団法人日本オペレーションズ・リサーチ学会 Journal of the Operations Research Society of Japan 04534514 20 3 164 181 1977-09 Discrete time Markov maintenance models are coupled with the theory of control of queues. Each system has an operating machine, spare machines and a repair facility. A decision maker has the option of opening or closing the repair shop when there are machines waiting for repair service, as well as the option of repairing or leaving an operating machine. A two-dimensional control limit policy is defined, and sufficient conditions for the optimality of a two-dimensional control limit policy are obtained for each model. 1977-09 110001183991 AA00703935 ENG NII-ELS 3 MARKOV MAINTENANCE MODELS WITH CONTROL OF QUEUE HATOYAMA YUKIO The Operations Research Society of Japan Journal of the Operations Research Society of Japan Discrete time Markov maintenance models are coupled with the theory of control of queues. Each system has an operating machine, spare machines and a repair facility. A decision maker has the option of opening or closing the repair shop when there are machines waiting for repair service, as well as the option of repairing or leaving an operating machine. A two-dimensional control limit policy is defined, and sufficient conditions for the optimality of a two-dimensional control limit policy are obtained for each model. HATOYAMA YUKIO Department of Management Engineering, Tokyo Institute of Technology