FAR 11.703—Contract clauses.
Plain-English Summary
FAR 11.703 tells contracting officers which standard FAR clauses to use when a solicitation or contract allows quantity variation in certain fixed-price acquisitions. It covers three separate clause decisions: the mandatory use of FAR 52.211-16, Variation in Quantity, for fixed-price supplies and for services that include furnishing supplies when a variation is authorized; the discretionary use of FAR 52.211-17, Delivery of Excess Quantities, in fixed-price supply contracts; and the mandatory use of FAR 52.211-18, Variation in Estimated Quantity, in fixed-price construction contracts that authorize variation in the estimated quantity of unit-priced items. The section exists to make quantity-risk terms explicit up front so both sides know when the Government may accept more or less than the stated amount, how excess deliveries are handled, and how estimated quantities in construction will be treated. In practice, this section helps prevent disputes over overdelivery, underdelivery, and unit-price adjustments by ensuring the right clause is included in the solicitation and carried into the contract. It is especially important where pricing, performance, and acceptance depend on quantity tolerances rather than a strict exact-quantity requirement.
Key Rules
Use 52.211-16 when variation is allowed
The contracting officer must insert FAR 52.211-16, Variation in Quantity, in solicitations and contracts when the acquisition authorizes a variation in quantity for fixed-price contracts for supplies or for services that involve furnishing supplies. This clause establishes the permitted quantity range and the consequences of delivering outside that range.
Optional clause for excess deliveries
The contracting officer may insert FAR 52.211-17, Delivery of Excess Quantities, in solicitations and contracts when a fixed-price supply contract is contemplated. Because this clause is discretionary, the contracting officer should use it only when the Government wants a defined rule for handling quantities delivered above the ordered amount.
Mandatory clause for construction unit prices
The contracting officer must insert FAR 52.211-18, Variation in Estimated Quantity, in solicitations and contracts when a fixed-price construction contract is contemplated and the contract authorizes variation in the estimated quantity of unit-priced items. This clause addresses how payment is adjusted when actual quantities differ from estimates.
Clause choice depends on contract type
The section distinguishes among fixed-price supply contracts, fixed-price service contracts that include furnishing supplies, and fixed-price construction contracts. The correct clause depends on both the contract type and whether the solicitation or contract authorizes quantity variation.
Insert clauses in both solicitation and contract
Each paragraph directs the contracting officer to include the applicable clause in solicitations and contracts, not just in the final award document. This ensures offerors understand the quantity-risk terms before pricing and that the same terms govern performance after award.
Responsibilities
Contracting Officer
Determine whether the acquisition authorizes quantity variation and select the correct clause. Insert FAR 52.211-16 when required, consider whether to include FAR 52.211-17 for fixed-price supply contracts, and insert FAR 52.211-18 when a fixed-price construction contract with unit-priced estimated quantities authorizes variation.
Contractor
Review the solicitation and contract clauses to understand the permitted quantity variation, pricing exposure, and delivery obligations. Price the offer and manage performance based on the clause included, especially where excess deliveries or estimated quantities may affect payment or acceptance.
Agency/Program Office
Provide accurate requirements, quantity estimates, and technical input so the contracting officer can decide whether quantity variation is appropriate. Ensure the requirement structure matches the intended contract type and the practical need for tolerance in quantities.
Practical Implications
This section matters because quantity variation can change price, acceptance, and payment outcomes; leaving out the right clause can create avoidable disputes.
Contracting officers should not assume one quantity clause fits all fixed-price buys; supply, service-with-supplies, and construction contracts are treated differently here.
A common pitfall is authorizing quantity flexibility in the solicitation but failing to include the matching clause, which can undermine enforceability and clarity.
Contractors should check whether the clause allows the Government to accept more or less than the stated quantity, and whether excess deliveries will be paid for or rejected.
For construction, the estimated-quantity clause is especially important on unit-priced items, where actual field quantities often differ from estimates and can materially affect final payment.
Official Regulatory Text
(a) The contracting officer shall insert the clause at 52.211-16 , Variation in Quantity, in solicitations and contracts, if authorizing a variation in quantity in fixed-price contracts for supplies or for services that involve the furnishing of supplies. (b) The contracting officer may insert the clause at 52.211-17 , Delivery of Excess Quantities, in solicitations and contracts when a fixed-price supply contract is contemplated. (c) The contracting officer shall insert the clause at 52.211-18 , Variation in Estimated Quantity, in solicitations and contracts when a fixed-price construction contract is contemplated that authorizes a variation in the estimated quantity of unit-priced items.