This paper introduces methods to control the cost of maintenance and repair for medical equipments through service team training, service contract control, system establishment and outside service resources, etc.

In this paper we consider the system of M/M/N queue with service interruptions, the rates of server breakdown are different between busy time and idle time, and there is one repairman in the system.

The fleet maintenance policy is proposed in concern with the unique service station and multiple assets.

The paper discusses the repairable queueing system with a general arrival, where the lifetime of server and the service time are also exponential random variables, the repair time is PH variable.

In this paper, we thoroughly investigate the structure of the repairable queueing system GI/G(M/G)/1 by renewal theory and the method of vector Markov process, and obtain its all interested.