你为客户执行的项目即将结束。客户签订了一个队项目产品进行三年保修的合同。项目经理首先应该怎么做？

Which one of the following is NOT a trade-off decision that must be made in the development of the project plan？

假设估计幅度的两端是平均数的±3西格玛，以下哪项幅度估计的风险最低？ （）

在项目进行过程中，2个项目成员使用不同版本的设计说明书，这时项目经理首先应该检查()。

Your organization is having a difficult time managing all of its project . You have been asked to help senior management get a better understanding of the problems . What do you do FIRST？