()在进行工作活动时间估算时，下列哪些方面应考虑？

Performance of a contract can bring liabilities other than the stated and implied warranty and guarantee that have implications of risk, but are perhaps not as visible Two of these liabilities are ________ and ________ infringements.

项目管理信息系统由哪些组成()。

编制项目计划的目标是 （）

塔古奇（TaguChi）法的目的是——（）