以下关于工作包的描述，正确的是（）。
- A.可以在此层面上对其成本和进度进行可靠的估算
- B.工作包是项目范围管理计划关注的内容之一
- C.工作包是WBS的中间层
- D.不能支持未来的项目活动定义
正确答案及解析
正确答案
解析
。工作分解结构是一种以结果为导向的分析方法，用于分析项目所涉及的工作，所有这些工作构成项目的整个工作范围。创建工作分解结构是一个把项目可交付成果和项目工作逐步分层分解为更小的、更易管理的项目单元的过程，它组织并定义了整个项目范围。项目的工作分解结构师管理项目范围的基础，详细描述了项目所要完成的工作。WBS的组成元素有助于项目干系人检查项目的最终产品。WBS的最底层工作单元被称为工作包，它是定义工作范围、定义项目组织、设定项目产品的质量和规格、估算和控制费用、估算时间周期和安排进度的基础。
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