Predictive life cycle :
– The project deliverables are defined at the beginning of the project and any changes to the scope are progressively managed.
–Three processes (Collect Requirements, Define Scope, and Create WBS) are performed toward the beginning of the project and updated as necessary, using the integrated change control process.
–Validate Scope occurs with each deliverable or phase review and Control Scope is an ongoing process.
–Baseline for the project is the approved version of the project scope statement, work breakdown structure (WBS), and its associated WBS dictionary. Baseline can be changed only through formal change control procedures
Adaptive or agile life cycle :
–The deliverables are developed over multiple iterations where a detailed scope is defined and approved for each iteration when it begins.
–Three processes (Collect Requirements, Define Scope, and Create WBS) are repeated for each iteration.
–Two processes (Validate Scope and Control Scope) are repeated for each iteration.
–Use backlogs (including product requirements and user stories) to reflect their current needs.