Which document defines performance-based acquisitions in specific and measurable terms?

The Performance Work Statement (PWS) is the document that outlines performance-based acquisitions in specific and measurable terms. It is designed to clearly articulate the expected outcomes and the standards by which the contractor's performance will be measured. The PWS focuses on the results rather than on the process, emphasizing the performance objectives that the contractor must achieve. This helps ensure that both the government and the contractor have a mutual understanding of the objectives to be accomplished, facilitating a clearer framework for performance accountability.

In contrast, while the Statement of Work (SOW) also describes what is required, it typically provides more detailed task-oriented descriptions rather than focusing solely on measurable performance outcomes. The Statement of Objectives (SOO) outlines the goals and desired outcomes but lacks the specific and measurable aspects that define a PWS. Similarly, the Performance Requirements Document (PRD) may include criteria for evaluating contractor performance but does not necessarily encapsulate the overall performance framework in a measurable way like the PWS does.