In the former software cost management, the cost estimation methods have some problems, such as subjective experience 's effect, uncertain estimation and so on.
在以往软件成本管理中，在成本估算方法方面存在着主观经验影响大，估算不准确等问题。
2
Fuzzy hierarchy estimation, which is more influenced by such subjective factors as scores given by experts, can be used in optimization of project schemes.
项目方案优化可采用模糊层次评价法，但该方法需专家打分，主观因素的影响比较大。
3
In the former software cost management, the cost estimation methods have some problems, such as subjective experience's effect, uncertain estimation and so on.