Abstract
Abstract There are two well-known classical replacement policies with minimal repairs. Policy I: A unit is replaced at time T and undergoes only minimal repairs at failures between replacements. Policy II: A unit is replaced on nth failure and failures between replacements are removed by minimal repairs. Several extensions of policy I have been proposed in recent times. However, policy II has attracted attention only sparingly. This paper proposes a general policy based on policies I and II, which includes several other replacement policies as particular cases. Optimal policies minimising the expected cost rate are also discussed. A numerical example is presented at the end.
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