This guide explains FAR Part 48 of the Federal Acquisition Regulation (FAR): Value Engineering.

A cheaper design is not an approved design. First, preserve essential performance, support the net savings, and obtain the contract modification before changing production.

Watch the FAR Part 48 lesson

A less expensive design is useful only if it still performs the required function. FAR Part 48 provides a structured route for value engineering proposals and contract-specific sharing of accepted savings.

FAR Part 48: Distinguish value engineering from a price cut

Under 48.101, value engineering seeks to eliminate unnecessary acquisition, operating, or support costs without impairing essential functions or characteristics. However, the voluntary incentive approach differs from a mandatory, paid program requirement. Therefore, the applicable clause and acquisition determine the process and sharing arrangement. A contractor cannot promise itself a savings share simply by identifying a cheaper component, and architect-engineer contracts do not receive value-engineering savings sharing under the stated framework.

Support the proposal and wait for the modification

Section 48.103 connects the proposal content and submission process to the applicable value-engineering clause. The contracting officer generally accepts or rejects within forty-five days; when additional time is needed, written reasons and an anticipated decision date are required. Approval is incorporated through a contract modification. However, until the modification becomes effective, the contractor performs the existing contract. In other words, an engineering discussion or favorable technical opinion is not permission to substitute the new design.

Calculate the relevant savings

Subpart 48.1 distinguishes instant, concurrent, and future acquisition savings from collateral savings such as operating or maintenance reductions. For example, development, testing, implementation, and relevant Government costs can affect the analysis. Sharing depends on the governing clause, approach, savings category, and other conditions. Next, keep gross estimated savings separate from net savings and the contractor’s share. Also, show assumptions, quantities, affected contracts, and the evidence that essential performance is preserved.

A hypothetical example

An alternative assembly reduces estimated unit cost by $40 across 1,000 units, suggesting $40,000 in gross reduction. However, the contractor still evaluates engineering, testing, implementation, and relevant Government costs, confirms reliability and required function, and applies the contract’s sharing terms. Therefore, the proposal remains an estimate until evaluated and accepted; production continues to the existing design until the authorized modification takes effect.

Avoid the shortcut

A convincing proposal makes the functional comparison easy to inspect. Then, identify what stays the same, what changes, and what testing supports the alternative. Also, separate one-time development and implementation costs from recurring unit savings. In addition, explain quantity and future-use assumptions rather than presenting an attractive total without a basis. Next, keep a decision log and the accepted modification with the final design record. This discipline supports evaluation; it does not convert an unaccepted idea into an authorized production change or guaranteed savings payment.

Try this exercise

Then, build a preparation worksheet using these fields. This is a GovSuccess practice, not a prescribed Government form.

1. Existing requirement and baseline
2. Proposed change
3. Essential functions preserved
4. Technical and test evidence
5. Development and implementation costs
6. Savings category and assumptions
7. Applicable sharing terms
8. Approval and effective modification

Turn the lesson into an operating decision

Also, use the worksheet with one current contract or proposed action. In addition, keep the documents reviewed, assign an owner to each unresolved issue, and record the basis for the decision. Next, distinguish a regulatory obligation from a GovSuccess preparation practice. Thus, the worksheet organizes evidence; it does not grant authority, change contract terms, or establish a Government determination.

Official sources

Source check: November 3, 2026 (Central). Codified Acquisition.gov pages retrieved for this package display FAC 2026-01, effective March 13, 2026. Then, check applicable agency deviations and the actual solicitation or contract. Model overhaul text and an implemented agency deviation are not interchangeable.

• FAR Part 48 — codified text
• FAR 48.001
• FAR 48.101
• FAR 48.102
• FAR 48.103
• FAR 48.104
• FAR 48.201
• FAR 48.202
• FAR overhaul and agency deviation guide — contract-specific verification

Build your readiness baseline

Explore GovAssessment for a structured business-readiness baseline based on your answers. However, it does not approve a contract action, certify compliance, or guarantee an award.

General education, not legal or tax advice. Browse all FAR summaries.