What are the rules for WBS decomposition?

The rules of WBS (Work Breakdown Structure) decomposition include:

• Hierarchy: The work breakdown should be structured in a hierarchy, where each level details the work of the previous level.
• Completeness: All work necessary to achieve the project goals should be included.
• Mutual Exclusivity: Elements at the same level should not overlap in content to avoid duplication.
• Manageability: Each element should be small enough to be planned, controlled, and evaluated.
• Defined outcome: Each element should have a clearly defined result or product.

These rules help make the project structure understandable and manageable.