A WBS should be a break down of every project task and deliverable defined by the project scope. If the WBS is poorly constructed the following can occur: missed deadlines, going over budget, scope creep, confused project team members, project replanning and extensions. A WBS is a way to visualize and organize the scope of a whole project. If this is not done correctly, it is hard to ensure all tasks, deliverables and milestones are getting done. The consequences listed above all cost the company time and money as well as cause frustration among team members. Therefore, making sure there is a well constructed WBS is important.

Does anyone have any first hand experience on what happened because of a poorly constructed WBS?