Which of the following items must be defined in an acceptance plan?

In an acceptance plan, the primary focus is on defining the criteria that will determine whether a project meets the required standards to be considered complete. Completion criteria are specific conditions or benchmarks that must be achieved for a project to be accepted by the stakeholders. These criteria encompass various factors such as performance metrics, quality standards, and functional requirements that the completed work must meet.

Defining completion criteria within an acceptance plan is crucial as it provides clarity for all parties involved regarding what constitutes a successful project delivery. It ensures that the outcomes align with the expectations and requirements outlined at the project's beginning, allowing for a structured approach to evaluating whether the work is satisfactory.

While elements such as the project budget, supplier list, and installation timeline are also important to the overall project management process, they do not directly address the evaluation of project deliverables and acceptance. Instead, they relate more to planning, resource allocation, and project scheduling. Thus, having defined completion criteria is essential in an acceptance plan to ensure that the end product meets the agreed-upon specifications and serves its intended purpose.