前导图法可以描述两种关键活动类型的依赖关系，对于同事A，交到同事B才可以下班的交接班过程，可以用（）描述。

单项选择题（）is a process of monitoring the status of the project to update the project costs and manage changes ti the cost baseline.

A.plan cost management
B.estimate costs
C.determine budget
D.control costs

单项选择题（）is a process of developing a detailed description of the project and product.

A.collect requirements
B.definition scope
C.validate scope
D.control range