Performance Work Statement (PWS)

A type of statement of work that describes desired outcomes and performance standards rather than prescribing how the work must be done, giving contractors flexibility to propose their best approach.

A Performance Work Statement (PWS) is a solicitation document that defines what the government wants accomplished rather than how a contractor must accomplish it. By focusing on measurable outcomes and performance standards, a PWS encourages innovation and lets contractors propose the most efficient and effective approaches for meeting the government's needs.

PWS vs. Statement of Work

A traditional Statement of Work (SOW) is prescriptive. It tells contractors exactly how to perform each task, what methods to use, and what processes to follow. A PWS describes the outputs and outcomes the government requires and sets performance standards for quality, timeliness, and reliability. This distinction matters significantly for proposal strategy because a PWS gives contractors latitude to differentiate through innovative or more efficient approaches.

Performance Standards and AQLs

A PWS typically includes an Acceptable Quality Level (AQL) for each performance requirement, defining the minimum acceptable standard. Performance below the AQL triggers deductions, corrective action requirements, or adverse past performance ratings. Some contracts use a Quality Assurance Surveillance Plan (QASP) that describes how the government will measure and verify contractor performance against the PWS standards.

Proposal Strategy for a PWS Solicitation

When responding to a PWS-based RFP, contractors should avoid simply restating the PWS back to the government. The evaluator already knows what they want. The proposal should explain the specific approach the contractor will use to achieve the required outcomes, why that approach is superior, and how performance will be measured and maintained at or above the required AQL.

PWS and Performance-Based Contracting

The PWS is the central instrument of performance-based contracting (PBC), a model encouraged by the FAR to shift risk to contractors and align contractor incentives with government outcomes. Performance-based contracts typically use award fee or incentive fee structures that reward contractors for exceeding performance standards.