Monitoring Lifetime Data for a Failure Censoring Reliability Test with Replacement Using Shewhart Type and Exponentially Weighted Moving Average Control Charts

Lifetime data has two distinguishing features: they are usually censored and have non-normal distributions. Generally speaking, censoring schemes can be classified into (i) with replacement (ii) without replacement. Replacement during a life testing means that once observing failure item, it is replaced by new one. While there relatively large body of literature regarding control charts under replacement, i.e., the second type schemes, designing for first not yet received considerable attention. In this paper, types developed to monitor lifetime an exponentially distributed item. To obtain information data, conducted: n items randomly selected put on test simultaneously. The continues until r (r≤n) failures. During test, time, Development Shewhart weighted moving average main novelty current study. Comparative simulation studies conducted. ARL curves also derived respect different parameters process.