A Comparison of PM2 and CE Growth Planning Models Based on Parameters Analysis

To obtain the reliable growth planning curve in the whole process of reliability growth test, reliability growth planning technology has developed and become an important part of the reliability growth plan. Reliability growth planning models, are generally used to describe reliability growth plans and produce growth planning curves. It is found that two widely used models, CE model and PM2 model, can produce very different growth planning curves even under the same input conditions. However, there are few papers to study the relationship and difference of these two models. This paper gives a comparison of the two models by studying on the relationships between the parameters of two models and the corresponding planning curves, considering that planning models are always influenced by their intrinsic parameters. The results show that, CE Model can correctly reflect the effect of Fix Effectiveness Factor and Management Strategy change on growth planning curve. In contrast, PM2 Model can not correctly reflect the effect of the two parameters change on growth planning curve. From this point of view, the CE Model seems more reasonable and acceptable than the PM2 Model.