Repairable System Reliability And Maintenance Strategies

Repairable systems reliability is an important branch of the reliability theory. For a repairable system, availability, reliability and mean time between failures are important indexes. Furthermore the maintenance policy of a repairable system is very significative for us to study. On the base of the existing research harvest, the paper has studied a cool standby repairable system and one unite system.In this paper, a two-identical component cold standby repairable system with a vacation is studied. In this system, the life distributions of the two components and the time of maintenance are assumed to be exponential distributions, but it is still assumed that the component after repair is not"as good as new", and the vocation time distribution is general distribution. Under above assumptions, by using geometric process and the method of supplementary variable, some reliability indices are derived.For the repairable system consist of one component, the paper has studied a new replacement policy, that is, We suppose T as the interval of the detailed repairs, Simply repairs is considered during the time of T , A detailed repair is made when the time arrives T . Assume that the simply repairs and detailed repairs are not"as good as new". N is the number of detailed repairs ,The two variable optimal replacement policy ( N , T ) is discussed by using the geometric process. The problem is to determine the optimal replacement policy ( N , T )? such that the long-run expected cost per unit time is minimized.