How the federal source selection process works under FAR Part 15: tradeoff versus LPTA, proposal ratings, the competitive range, discussions and the award. The government picks a winner under FAR Part 15, on factors it published in advance. Here is the whole path, from the Section M factors to the signed decision document. A federal source selection process turns a stack of proposals into one signed award. The government reads every proposal against the factors it published, rates each one, and then names a winner. The rules sit in FAR Part 15. They set what the agency may consider, who holds the pen at each stage, and what the contract file must show afterwards. This guide walks the whole path. It starts where the solicitation fixes the evaluation factors and ends where the source selection authority signs the decision. How Source Selection Works Three documents govern the process. Section L of the solicitation tells offerors how to prepare and submit a proposal. Section M names the evaluation factors, the significant subfactors, and their relative importance. FAR Part 15, Subparts 15.1 and 15.3, govern what the agency does with what arrives. FAR 15.303(b)(4) puts a hard edge on that. The source selection authority must ensure that the team evaluates proposals "based solely on the factors and subfactors contained in the solicitation." A factor the solicitation never named cannot earn a point. An unstated preference cannot cost one either. FAR 15.304 tightens it further. The agency evaluates price or cost in every source selection. It must state all factors and significant subfactors clearly, together with their relative importance. The solicitation also has to say whether the non-cost factors, combined, outweigh cost, approximately equal it, or sit below it. That is why Section M drives bid strategy more than Section L does. Section L controls what an offeror may send. Section M controls what the government may count. ! Six stages of a federal source selection, from the solicitation setting the factors to the source selection authority making a documented decision, with a dashed path showing award without discussions (https://mhhifytmrlyksfrjacvi.supabase.co/storage/v1/object/public/blog-images/2026/10/federal-source-selection-process-figure.png) Award without discussions skips the competitive range and the revision round, so the first submission is the only one the government reads. Tradeoff Or Lowest Price FAR 15.101 calls the available approaches a best value continuum. The agency picks a point on that line and publishes the choice. At one end sits the tradeoff process. FAR 15.101-1 (https://www.ecfr.gov/current/title-48/chapter-1/subchapter-C/part-15/subpart-15.1) applies "when it may be in the best interest of the Government to consider award to other than the lowest p
The government picks a winner under FAR Part 15, on factors it published in advance. Here is the whole path, from the Section M factors to the signed decision document.
A federal source selection process turns a stack of proposals into one signed award. The government reads every proposal against the factors it published, rates each one, and then names a winner. The rules sit in FAR Part 15. They set what the agency may consider, who holds the pen at each stage, and what the contract file must show afterwards. This guide walks the whole path. It starts where the solicitation fixes the evaluation factors and ends where the source selection authority signs the decision. How Source Selection Works Three documents govern the process. Section L of the solicitation tells offerors how to prepare and submit a proposal. Section M names the evaluation factors, the significant subfactors, and their relative importance. FAR Part 15, Subparts 15.1 and 15.3, govern what the agency does with what arrives. FAR 15.303(b)(4) puts a hard edge on that. The source selection authority must ensure that the team evaluates proposals "based solely on the factors and subfactors contained in the solicitation." A factor the solicitation never named cannot earn a point. An unstated preference cannot cost one either. FAR 15.304 tightens it further. The agency evaluates price or cost in every source selection. It must state all factors and significant subfactors clearly, together with their relative importance. The solicitation also has to say whether the non-cost factors, combined, outweigh cost, approximately equal it, or sit below it. That is why Section M drives bid strategy more than Section L does. Section L controls what an offeror may send. Section M controls what the government may count. ! Six stages of a federal source selection, from the solicitation setting the factors to the source selection authority making a documented decision, with a dashed path showing award without discussions (https://mhhifytmrlyksfrjacvi.supabase.co/storage/v1/object/public/blog-images/2026/10/federal-source-selection-process-figure.png) Award without discussions skips the competitive range and the revision round, so the first submission is the only one the government reads. Tradeoff Or Lowest Price FAR 15.101 calls the available approaches a best value continuum. The agency picks a point on that line and publishes the choice. At one end sits the tradeoff process. FAR 15.101-1 (https://www.ecfr.gov/current/title-48/chapter-1/subchapter-C/part-15/subpart-15.1) applies "when it may be in the best interest of the Government to consider award to other than the lowest p