而计划是项目管理的基本组成部分，包括明确项目目标和工作范围。项目成本估算有因素估算法和利用WBS方法的详细估算。
But the plan is the basic component of project management , including defining the goal working range of project , estimating project cost have estimation may use the computing method and detail computing method of using WBS .
因素估算法