An Improved NHPP Model with Time-Varying Fault Removal Delay

作     者：Xue Yang Nan Sang Hang Lei 

作者机构：School of Computer Science and Engineering. University of Electronic Science and Technology of China （UESTC） Chengdu 610054 China 

出 版 物：《Journal of Electronic Science and Technology of China》 (中国电子科技（英文版）)

年 卷 期：2008年第6卷第3期

页      面：334-337页

学科分类：08[工学] 0835[工学-软件工程] 081202[工学-计算机软件与理论] 0812[工学-计算机科学与技术（可授工学、理学学位）] 

基　　金：the National High Technology Research and Development Program of China (863 Program) under Grant No. 2006AA01Z173 

主　　题：Fault removal delay fault removal efficiency non-homogeneous Poisson process (NHPP) software reliability software reliability growth model 

摘      要：In this paper, an improved NHPP model is proposed by replacing constant fault removal time with time-varying fault removal delay in NHPP model, proposed by Daniel R Jeske. In our model, a time-dependent delay function is established to fit the fault removal process. By using two sets of practical data, the descriptive and predictive abilities of the improved NHPP model are compared with those of the NHPP model, G-O model, and delayed S-shape model. The results show that the improved model can fit and predict the data better.