
What is a WBS?
A WBS is a hierarchical decomposition of the deliverables needed to complete a project. It breaks the deliverables down into manageable work packages that can be scheduled and have costs and resources assigned to them. As a rule, the lowest level should be two-week work packages. Another rule commonly used when creating a WBS is the 8/80 rule. This rule says no single activity should be less than 8 hours, or greater than 80 hours.
A WBS is deliverables based; meaning the product or service the customer will get upon the project's completion. There is another tool called a Product Breakdown Structure (PBS), which comes before the WBS and breaks a project down into outputs (products) needed to complete the project...