Statement of Work (SOW)
A Statement of Work (SOW) is the contract document that prescribes, in specific and directive terms, the tasks a contractor must perform, the deliverables due, and the schedule — placing responsibility for the approach on the government.
The SOW is the traditional, task-oriented way to specify work: it tells the contractor what to do and often how to do it. That precision is appropriate when the government knows exactly what it needs — construction, studies with fixed methodologies, well-understood technical work.
The tradeoff is risk allocation. Because the government prescribed the method, the contractor is generally entitled to payment for following it even when the outcome disappoints. This is the core reason performance-based alternatives (PWS, SOO) exist for services.
In practice, the three documents form a spectrum of prescription: SOW (most directive), PWS (outcome-based), SOO (objectives only, contractor proposes the solution).
Regulatory Reference
FAR Part 11; FAR 37.602
RFO Status
Under the Part 37 model deviation, service work-description policy moves to subpart 37.1 (37.101-1 and 37.102-1); the published FAR still carries Part 11 and 37.602, so both citations remain valid until rulemaking lands.
Category
Documents & Artifacts
How AcqBot Helps
AcqBot drafts SOWs from your requirements record and flags prescriptive language you may want to convert to performance standards — with side-by-side PWS and SOO alternatives generated from the same inputs.
Related glossary entries
Justification & Approval (J&A)
A Justification & Approval (J&A) is the formal document required by FAR 6.303 to justify awarding a federal contract without full and open competition, citing one of seven statutory exceptions and approved at thresholds based on dollar value.
Performance Work Statement (PWS)
A Performance Work Statement (PWS) describes required outcomes and measurable performance standards for a services acquisition rather than prescribing how the work must be done, enabling contractors to propose their own methods under performance-based acquisition.
Statement of Objectives (SOO)
A Statement of Objectives (SOO) is a brief government document stating top-level acquisition objectives and desired outcomes, leaving offerors free to propose their own technical approach and performance work statement in response.
Independent Government Cost Estimate (IGCE)
An Independent Government Cost Estimate (IGCE) is the government's own documented estimate of what a requirement should cost, developed without contractor input, used to validate budgets, evaluate price reasonableness, and support negotiation positions.