FAR 52.211-16—Variation in Quantity.
Plain-English Summary
FAR 52.211-16, Variation in Quantity, addresses when a contractor may deliver more or less than the exact quantity stated in the contract and still have the delivery accepted. It applies only to quantity differences caused by loading, shipping, packing, or manufacturing-process allowances, not to general performance shortfalls or overproduction outside the clause’s limits. The clause requires the contracting officer to specify both the allowable percentage increase and decrease and to identify exactly which quantity measure the tolerance applies to, such as the total contract quantity, a specific line item, each scheduled delivery quantity, the total quantity for each destination, or the total quantity of each item regardless of destination. In practice, this clause gives flexibility for normal production and logistics variation while protecting the Government from unexpected quantity changes. It is especially important in supply contracts where exact counts can be affected by packaging, containerization, or manufacturing tolerances. The clause also creates a clear acceptance standard so both parties know in advance what quantity variation is permissible and how it will be measured.
Key Rules
Only certain causes qualify
A quantity variation is acceptable only if it results from loading, shipping, packing, or manufacturing-process allowances. Variations caused by other reasons are not covered by this clause and may be treated as nonconforming performance.
Variation must stay within stated limits
Even when the cause is covered, the contractor may vary only within the percentage increase and decrease inserted by the contracting officer. Any amount outside those limits is not authorized by the clause.
Contracting officer must set percentages
The clause is incomplete until the contracting officer inserts the allowable percent increase and percent decrease. Those percentages define the tolerance band for acceptable delivery quantities.
Scope of the tolerance must be identified
The contracting officer must also specify what the percentage applies to, such as the total contract quantity, a single item, each delivery schedule quantity, the total quantity for each destination, or the total quantity of each item without regard to destination. This prevents disputes over how to calculate the variation.
Acceptance is limited to covered variation
The Government is not required to accept quantity differences beyond the clause’s scope. If the variation is not caused by the listed conditions or exceeds the stated tolerance, the delivery may be rejected or otherwise handled under the contract’s other remedies.
Responsibilities
Contracting Officer
Decide whether to include the clause, insert the allowable percentage increase and decrease, and clearly identify the quantity basis to which the percentages apply. The contracting officer should ensure the tolerance matches the procurement’s needs and does not create unintended pricing, delivery, or acceptance issues.
Contractor
Deliver quantities within the stated tolerance and ensure any overage or shortage is attributable to the covered causes. The contractor should manage production, packaging, and shipping processes to stay within the contract’s permitted variation and avoid unapproved deviations.
Receiving/Inspection Personnel
Measure delivered quantities against the contract’s stated tolerance and the designated quantity basis. They must accept only those variations that fall within the clause and are otherwise compliant with contract requirements.
Agency/Program Office
Provide requirements that reflect operational needs, especially where exact counts matter or where some variation is acceptable. The agency should coordinate with the contracting officer so the tolerance and measurement method align with mission needs.
Practical Implications
This clause is most useful when exact unit counts are hard to control because of packaging, shipping, or manufacturing realities. It helps avoid unnecessary disputes over minor quantity differences that are normal in supply chains.
The biggest pitfall is failing to specify what the percentage applies to. If the contract does not clearly state the measurement basis, the parties may disagree about whether the tolerance is applied to each shipment, each line item, or the total contract quantity.
Another common issue is setting percentages that are too broad or too narrow. Too broad can let in unwanted overages or shortages; too narrow can create avoidable rejection of otherwise reasonable deliveries.
Contractors should not assume this clause excuses all quantity differences. It only covers the listed causes and only within the stated limits, so documentation and quality control still matter.
Contracting officers should coordinate this clause with pricing, inspection, and delivery terms so the tolerance does not conflict with other contract provisions or create payment disputes.
Official Regulatory Text
As prescribed in 11.703 (a) , insert the following clause: Variation in Quantity (Apr 1984) (a) A variation in the quantity of any item called for by this contract will not be accepted unless the variation has been caused by conditions of loading, shipping, or packing, or allowances in manufacturing processes, and then only to the extent, if any, specified in paragraph (b) of this clause. (b) The permissible variation shall be limited to: ___ Percent increase [ Contracting Officer insert percentage ] ___ Percent decrease [ Contracting Officer insert percentage ] This increase or decrease shall apply to ____________ .* * Contracting Officer shall insert in the blank the designation(s) to which the percentages apply, such as- (1) The total contract quantity; (2) Item1 only; (3) Each quantity specified in the delivery schedule; (4) The total item quantity for each destination; or (5) The total quantity of each item without regard to destination. (End of clause)