Evaluation Factors (EF)
Evaluation Factors (EF): the specific criteria the government uses to evaluate proposals under FAR 15.304, documented in Section M of the solicitation.
What Is Evaluation Factors?
Evaluation Factors are the criteria documented in Section M that the source selection team applies to evaluate each proposal. FAR 15.304 requires that Evaluation Factors and their relative importance be stated in the solicitation; offerors must know what the agency will score.
Section M typically specifies: the Evaluation Factors and any Significant Subfactors; the relative importance of each factor and subfactor; the rating scale for each factor (color ratings, adjectival ratings, or numeric scores); the relationship between price and non-price factors; and any special evaluation considerations. FAR 15.304(c) lists three required Evaluation Factors that must always be considered: cost or price, the quality of the product or service (which includes technical approach, management, prior experience, past performance, and other relevant factors), and, when small business subcontracting plans apply, the offeror's small business utilization plan.
Key Characteristics
Evaluation Factors have several defining attributes. They are documented: published in Section M of the solicitation.
They are mandatory: FAR 15.304(c) requires at minimum cost/price, quality, and (where applicable) small business participation. They are weighted: the relative importance of each factor must be stated in the solicitation.
They are bindable: the source selection team must evaluate proposals against the documented factors, not against unstated criteria. They support the Basis of Award (LPTA, Best Value Tradeoff, or other structure).
They are protest-relevant: misapplication of Evaluation Factors is a frequent basis for sustained bid protests. They vary by procurement: each procurement defines its own Evaluation Factors reflecting what the agency values most for that acquisition.
How It Works in Government Contracting
Evaluation Factors operate at three critical points in the source selection cycle. First, during solicitation preparation, the contracting officer and source selection team define the Evaluation Factors based on the Source Selection Plan: which factors matter, how they weigh against each other, and how the agency will make tradeoff decisions. The factors are codified in Section M.
Second, during proposal preparation, offerors study the Evaluation Factors carefully and design their proposals to maximize their score. An offeror that misreads the Evaluation Factors (over-investing in lightly weighted factors, under-investing in heavily weighted factors) wastes proposal investment.
Third, during source selection, the evaluation team applies the Evaluation Factors to each proposal, producing factor-level ratings. The team then applies the Basis of Award (LPTA or tradeoff) to combine the factor ratings into an overall recommendation.
The Source Selection Decision Document explains how the team applied the Evaluation Factors to reach the award decision. Evaluation Factors can be amended through solicitation amendments before proposals are submitted; changes require offerors to revisit and potentially revise their proposals.
Real-World Example
A federal agency issues an RFP for a $30 million engineering services contract. Section M establishes the following Evaluation Factors: Factor 1 - Technical Approach (most important); Factor 2 - Management Approach (less important than Factor 1); Factor 3 - Past Performance (less important than Factor 2); Factor 4 - Price (substantial but least important among the four).
Non-price factors combined are more important than price. The Technical Approach factor has three Significant Subfactors: Subfactor 1A (Systems Engineering Approach), Subfactor 1B (Risk Management), Subfactor 1C (Schedule Realism). The Management Approach factor has two Significant Subfactors. The Past Performance factor uses confidence ratings (Substantial Confidence, Satisfactory Confidence, Limited Confidence, No Confidence).
Five offerors submit proposals. The evaluation team applies the Evaluation Factors, producing factor-level ratings for each offeror.
The team conducts a tradeoff analysis combining the factor ratings and selects the offeror with the strongest non-price factor combination at a price premium justified under the tradeoff methodology. The SSDD documents the Evaluation Factor application and the tradeoff rationale.
Regulatory Framework
Evaluation Factors are governed by FAR 15.304 (Evaluation Factors and Significant Subfactors), FAR 15.305 (Proposal Evaluation), FAR 15.308 (Source Selection Decision Document), and FAR 15.204 (Uniform Contract Format, which establishes Section M). FAR 15.304(c) requires at minimum: cost or price; quality of the product or service (technical approach, management, experience, past performance); and small business utilization plan (where applicable).
FAR 15.304(d) addresses subfactor structure and weighting. DFARS adds defense-specific Evaluation Factor guidance.
Procurement integrity is governed by FAR Subpart 3.1 and the Procurement Integrity Act. Source selection decisions that misapply Evaluation Factors are frequent bases for sustained bid protests at GAO and the Court of Federal Claims.
Why It Matters for Contractors
Evaluation Factors are the rules of the source selection competition. Understanding them is foundational to proposal strategy: a proposal that aligns with the agency's Evaluation Factors (heavy investment in heavily weighted factors, disciplined response in lower-weighted factors) materially outperforms a proposal that treats every section equally.
Evaluation Factors interact with Basis of Award (the methodology for combining factor ratings into a source selection decision), with Section M (the document where Evaluation Factors are codified), with Section L (which provides preparation instructions corresponding to the Evaluation Factors), with the compliance matrix (which tracks Section L and Section M requirements), and with debriefings (where unsuccessful offerors learn how their proposal was rated against the factors). Capture teams that invest heavily in Evaluation Factor analysis win at materially higher rates than teams that treat the factors as a procedural checklist.
Common Misconceptions
The agency can use unstated Evaluation Factors during source selection.
FAR 15.304 requires that Evaluation Factors and their relative importance be stated in the solicitation. Source selection decisions that apply unstated factors are frequent bases for sustained bid protests.
All Evaluation Factors are weighted equally.
The solicitation specifies the relative importance of each factor. Some factors are explicitly most important; others are explicitly less important. The relative importance is binding on the source selection team.
Price is always the least important Evaluation Factor.
The relative importance of price varies by procurement. In some procurements (LPTA), price is the deciding factor when technical proposals are acceptable. In others (Best Value Tradeoff), price is less important than technical and management factors. The solicitation specifies the relationship.
Frequently Asked Questions
What are Significant Subfactors?
Subcomponents of an Evaluation Factor that are themselves given separate weight in the evaluation. FAR 15.304 requires Significant Subfactors to be disclosed in the solicitation. Factors and Subfactors together define the evaluation framework.
Can the relative importance of Evaluation Factors be changed after solicitation release?
Only through a formal solicitation amendment that provides offerors notice and opportunity to revise. The contracting officer cannot apply unstated weightings; doing so is grounds for sustained protest.
How are Past Performance Evaluation Factors rated?
Typically using confidence ratings (Substantial Confidence, Satisfactory Confidence, Limited Confidence, No Confidence) reflecting the source selection team's confidence in the offeror's ability to perform based on documented past performance. The specific rating methodology is in Section M.
Where in the solicitation are Evaluation Factors documented?
Section M (Evaluation Factors for Award) under the Uniform Contract Format. Section L (Instructions, Conditions, and Notices to Offerors) provides corresponding proposal preparation instructions.
Related Government Contracting Topics
Section M: Solicitation section that documents Evaluation Factors.
Basis of Award: Methodology for combining Evaluation Factor ratings into a source selection decision.
Section L: Proposal preparation instructions; corresponds to the Evaluation Factors in Section M.
Past Performance: Common Evaluation Factor; documented contractor track record.
Bid Protest: Formal challenge to a contract award; misapplication of Evaluation Factors is a frequent basis.
How LotusPetal AI Helps
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