Age Replacement Model of a Used System

As there are various replacement policies for maintaining and improving operating and non-operating systems, this paper investigated the properties of an age replacement model of a used series system of a certain age. The system is subjected to two types of failures: Type I and Type II. It is assumed that, Type I failure is a repairable one, while Type II failure is a non-repairable one. An analytical expression of the expected cost rate for a used series system with n components was obtained. A simple illustrative numerical example was made available to analyze the effectiveness and properties of the constructed replacement model.