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An Improved NHPP Model with Time-Varying Fault Removal Delay
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作者 Xue Yang Nan Sang Hang Lei 《Journal of Electronic Science and Technology of China》 2008年第3期334-337,共4页
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... 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. 展开更多
关键词 fault removal delay fault removal efficiency non-homogeneous poisson process (NHPP) software reliability software reliability growth model
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排错效率和故障发现率可变的软件费用模型
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作者 滕云龙 唐应辉 《系统工程与电子技术》 EI CSCD 北大核心 2007年第11期1962-1964,1968,共4页
考虑非齐次泊松过程(NHPP)类软件可靠性增长模型,引入以时间为变量的故障排除效率函数和故障发现率函数,建立了软件费用模型,使模型更具有一般性,更符合实际情况。以软件费用最小作为优化目标,讨论了最优释放时间与软件开发的最小费用,... 考虑非齐次泊松过程(NHPP)类软件可靠性增长模型,引入以时间为变量的故障排除效率函数和故障发现率函数,建立了软件费用模型,使模型更具有一般性,更符合实际情况。以软件费用最小作为优化目标,讨论了最优释放时间与软件开发的最小费用,实例计算给出了测试时间随故障发现率中的参数的变化情况。 展开更多
关键词 软件可靠性 增长模型 非齐次泊松过程 故障发现率 故障排除效率 软件费用模型
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