基于类比的软件成本估算及其一种改进方法

基于类比的软件成本估算方法利用相似的历史项目信息来预测目标项目的属性值,具有不需要校准、能够在没有统计关系可以利用的情况下发挥作用等优点。本文在类比估算四个基本步骤的框架下,详细说明了类比估算所必须进行的相关操作,并参照案例推理系统把类比估算过程描述为一个从数据收集、属性选取开始,到估算报告输出、结果重用的循环结构。根据估算实践,提出了针对大数据集的计算优化方法,不仅有效降低了估算过程中的计算量,而且在一定程度上避免了次要因素的影响,提高了估算的可信度。

Analogy-Based Software Cost Estimation and Its Improvement

Estimation by analogy(EBA) in software cost estimation is an application of the theory of case-based reasoning,and it uses information from the former similar projects to predict the cost of a new project.Some advantages are offered by analogy-based estimation:first,it is easy to understand the basis of estimation.Second,it has the potential to mitigate problems with calibration.And finally,it is useful when the domain is difficult to model.According to the four basic steps of analogy,an open framework is d...