【问题3】（4分）销售部门反映“目前开发的产品不是他们需要的产品”，请简要分析可能的原因。

In project management, a （ ）is a list of a project’s milestones, activities, and deliverables, usually with intended start and finish date. Those items are often estimated in terms of resource allocation, budget and duration, linked by dependencies and scheduled events.