In which phase do project managers typically develop a project management plan?

The development of a project management plan is primarily conducted during the Planning phase. This phase is crucial as it involves outlining the project's objectives, scope, resources, schedule, costs, and quality requirements, among other aspects. The project management plan serves as a comprehensive guide for executing and managing the project effectively.

During the Planning phase, project managers gather input from stakeholders, analyze risks, and develop strategies to address potential issues. This is the stage where the groundwork for the project's execution and control is laid, making it essential for the success of the project. By creating a detailed and structured project management plan, project managers ensure that all team members understand their responsibilities and the project’s goals, thereby facilitating better coordination and communication.

In contrast, other phases such as Initiation involve defining the project at a high level and securing approvals to start, Execution focuses on carrying out the project plan, and Closure centers on finalizing all activities, conducting evaluations, and formally closing the project. Therefore, the Planning phase is specifically dedicated to the comprehensive preparation and strategy development necessary for effective project management.