What is the difference between a project management plan and a project schedule?

The project management plan is the comprehensive master document that defines how the project will be executed, monitored, controlled, and closed. It includes subsidiary plans for scope, schedule, cost, quality, resources, communications, risk, procurement, and stakeholder engagement plus baselines for scope, schedule, and cost. The project schedule is just one component within the project management plan, detailing the sequence of activities, their durations, dependencies, and milestones needed to complete the project.