For a project with a long timeline and complex scope, where the client requires both a high-level, long-term plan and the ability to add features incrementally, a hybrid approach is suitable. Starting with a predictive approach allows the project manager to establish a clear structure and plan using a work breakdown structure (WBS). This sets the foundation for the project's scope, deliverables, and milestones. Transitioning to an agile approach for execution enables the project to adapt to changes and deliver value incrementally, which meets the client's need for immediate functionality and continuous improvement. This hybrid method leverages the strengths of both approaches: the clarity and predictability of a predictive approach and the flexibility and responsiveness of an agile approach12.
References: The PMBOKGuide and PMI-PBA guidelines support the use of hybrid methodologies for managing projects with complex scopes and long timelines. They advocate for a structured planning phase followed by an adaptive execution phase to ensure that projects can respond to changes while delivering incremental value12.