Federal buyers evaluate proposals under one of two broad regimes, and Section M states which one applies to your solicitation. The two work almost oppositely, so knowing which one you are in before you draft a word changes where your team's limited hours should go.
Lowest price technically acceptable
Under LPTA, the government sets a technical bar, described as "acceptable" against stated standards, and grades your technical volume as a pass or fail against that bar, not on a curve. Once your proposal clears it, the technical scoring is finished. Among every offeror who passed, award goes to whoever priced lowest. A technical volume that is brilliant, beautifully written, and far beyond what "acceptable" required earns exactly the same technical outcome as one that barely cleared the bar: a pass. Every hour spent polishing technical content past the acceptability standard is an hour that bought nothing, because the government structurally cannot reward it. That effort belongs in your price instead, making sure your cost buildup is both competitive and realistic, since under LPTA, price is not one factor among several. It is close to the whole decision once you are through the gate.
Best value tradeoff
Under a best value tradeoff, technical factors are actually scored or rated, not just passed, and Section M states how those factors relate to each other and to price: technical significantly more important than price, roughly equal to price, or some other stated weighting. The government is allowed to pay more for a proposal that is meaningfully better on the factors that matter to the buyer. Here, differentiation is the whole game. A technical narrative that is merely acceptable leaves real points on the table, and the hours your team spends sharpening approach, staffing, and past performance can directly change who wins, in a way LPTA structurally will not let them.
Read Section M, not the solicitation's reputation
The single tell is in Section M's own language, not in what kind of work is being bought or what agency is buying it. Look for the phrase describing how award will be made: language like "lowest price, technically acceptable" signals LPTA, while language describing a tradeoff, or stating that non-price factors, combined, are worth more than price, signals best value. See Sections L and M are the whole test for how to read that section closely before you draft anything.
Where this changes your hours
The practical mistake goes both directions. Teams sometimes overinvest in technical polish on an LPTA bid, spending days on a volume that only needed to clear a bar, while barely scrutinizing their price. Just as often, teams treat a best value tradeoff like an LPTA competition, writing the minimum viable technical narrative and hoping price carries them, when the solicitation explicitly stated technical was worth more. Matching your team's effort to the regime Section M actually describes, instead of the one you assume, is most of the strategy here. The rest is pricing the work correctly once you know how much that price has to carry.