When training new project team members,you were asked what should be done during scope verification,your answer should be:

资源库是()。

如果成本偏差和进度计划偏差相同，那么：（）

你在负责为某个大公司安装声音回传系统。你开始准备估算时出资人告诉你估算必须尽可能接近实际。你最可能使用下列哪个做你的估算？

Which of the following is an important input to scope verification？