Which knowledge area includes the development of the project scope statement?

The development of the project scope statement is a key component of Project Scope Management. This knowledge area focuses specifically on defining and controlling what is included and what is not included in the project. The project scope statement serves as a foundational document that outlines the project's deliverables, goals, and boundaries. It clearly defines the project objectives and the work required to achieve them, ensuring that all stakeholders have a shared understanding of the project’s scope.

By detailing the project's boundaries and specific deliverables, the scope statement helps in preventing scope creep, which is the gradual expansion of project scope without adjustments to time, cost, and resources. Effective scope management is essential for project success, as it steers project execution and ensures that all team members are aligned with the project's goals and objectives.

In contrast, the other knowledge areas mentioned in the choices—cost management, quality management, and schedule management—do not focus primarily on the definition and development of the project scope, although they may be influenced by it. Therefore, the correct association with the development of the project scope statement lies within Project Scope Management.