Abstract: The method of embedded software system measurement is offered based on the COSMIC-FFP model optimization. Thereby solving the problem of COSMIC-FFP model does not support to measure embedded real-time system with complicated mathematical algorithm. And on this basis the software defects measurement method is put forward. Software project risk management deficiencies are discovered during the whole process of software development, and software project risks are reduced by use of the new method.

Key words: software measurement, defect density, risk analysis

摘要： 通过对COSMIC-FFP模型的扩展优化提出了嵌入式软件系统度量的方法，从而解决了COSMIC-FFP模型不支持对含有复杂数学算法的嵌入式实时系统度量的问题，基于软件规模度量提出了软件缺陷度量的方法。通过对软件规模的准确度量和对软件缺陷风险的分析，发现软件项目过程风险管理的不足，达到降低软件项目过程风险的目的。

关键词: 软件度量, 缺陷密度, 风险分析