Abstract

Life cycle costs are the total costs of a system over its lifetime. The present worth of these costs may be used to compare and select economic alternatives—especially at the design stage. For a system with uncertain lifetime, the present worth cost is a function of the system lifetime distribution and the compound interest rate. In this paper, the present worth single payment factors for a stochastically operating and continuously commissioned system are developed. The factors represent reality by taking into consideration the arbitraries in the system life cycle as determined by the user.

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