اختبار شهادة إدارة المشاريع Project Management Professional (PMP)

An organization is about to start a multiphased project. Due to strict regulations, some of the phases must be completely planned in advance. However, other phases allow for more flexibility and experimentation on scope and schedule. The sponsor wants to pursue the project objectives as planned, but also wants to accommodate new information and changes as the project progresses.
Which project management approach should the project manager select for this project?