摘要
FPA是软件规模估计中的重要方法。提出了利用估计项目与历史项目之间类比度进行软件规模估计的一种改进FPA方法。方法中利用FPA中的14个系统特征构造一个系统特征向量,以向量间的2-范式距离的倒数作为项目之间的类比度,并结合历史项目的相对误差实现对标准FPA估计值的修正。计算实例表明,改进后的方法比标准FPA法具有更低的估计误差。
FPA is an important method for software size estimation. This paper presents an improved method by the analogy of the evaluated software project and existing software systems to acquire better accuracy. This method construets a vector from the general system characteristics in FPA, and takes the reciprocal of 2-normal distance of vectors as the analogy degree of the evaluated project and the existing projects, and revises the FPA result taking the relative errors of the existing software projects into account. The calculation instance shows that it gets a more accurate result than the standard FPA.
出处
《微电子学与计算机》
CSCD
北大核心
2006年第3期85-87,90,共4页
Microelectronics & Computer
关键词
FPA
软件规模估计
系统特征
类比
类比度
FPA, Software size estimation,System characteristics, Analogy, Analogy degree
