Final answer:
In the procurement process, the project manager defines project resources and makes the case for obtaining them in the Initiating phase. This involves identifying necessary resources and justifying their need for project success.
Step-by-step explanation:
The phase in the procurement process where a project manager defines project resources and makes the case for obtaining them is during the Initiating phase. At this stage, the project manager identifies the project's scope and objectives and determines what resources will be necessary to achieve these goals. This includes staffing, materials, equipment, or any other requirements. The project manager must then justify the need for these resources and how they will contribute to the project's success. This is a critical step in securing the necessary approvals and funding before moving forward with the project. This part of the procurement process is essential for developing the project's baseline for scope, time, and cost, which will later become the reference for project planning and execution.