Abstract: Establishing and improving software process capability is the requirement of the high maturity level of CMM or CMMI, and also a difficult problem of software measurement. This paper discusses the related concepts and issues of software process capability, defines the software process capability indexes, and gives the quantitative solution to establish and improve software process capability by using XmR control chart technique of statistical process control. An example of establishing and improving software process capability is given to illustrate the usage of the quantitative solution.

Key words: statistical process control, XmR control chart, process variation, process stability, software process capability, process improvement

摘要： 建立和改进软件过程能力是CMM或CMMI高成熟度等级的要求，也是软件度量的一大难点。该文探讨了与软件过程能力相关的一些概念和问题，定义了软件过程能力指数，采用统计过程控制的XmR控制图技术给出了建立和改进软件过程能力的一个定量化解决方案，并使用一个软件项目模块编码和单元测试的软件过程能力建立和改进的实例演示和说明了该解决方案的使用过程和方法。

关键词: 统计过程控制, XmR控制图, 过程变异, 过程稳定性, 软件过程能力, 过程改进

CLC Number: 

• TP311