Public owners buy design services and construction very differently. Construction is often awarded to the lowest responsive bid; professional design is usually awarded through Qualifications-Based Selection, where firms are ranked on competence and fee is negotiated only after selection. Understanding which regime you're in tells you whether price belongs in your submission at all.
| QBS | Low-bid (sealed bidding) | |
|---|---|---|
| Basis of award | Qualifications, then negotiated fee | Lowest responsive, responsible price |
| When price enters | After selection, with the top-ranked firm | It is the deciding factor |
| Best suited to | Professional design (A-E) services | Well-defined work like construction |
| Typical documents | SOQ or SF330 | Sealed bid to plans and specs |
| Legal basis (federal) | Brooks Act | Sealed bidding under the FAR |
How low-bid works
In low-bid procurement, the owner fully defines the work with plans and specifications, firms submit sealed prices, and the award goes to the lowest responsive, responsible bidder. It's efficient when scope is fixed and comparable across bidders - which is why it fits construction and commodity purchases. See Invitation to Bid for the construction version.
How QBS works
In QBS, the owner advertises the project and evaluation criteria, firms submit qualifications, an evaluation board ranks and shortlists the most qualified, and the owner negotiates a fair and reasonable fee with the top-ranked firm - moving to the next firm only if negotiations fail. Price never enters the ranking.
Why design uses QBS
Design fees are a small fraction of a project's lifecycle cost, while design quality drives the far larger construction and operating costs. Selecting the cheapest designer can raise total cost through change orders, rework, and inefficient designs. That's the logic behind the federal Brooks Act (1972), which requires QBS for federal A-E services, and the state 'mini-Brooks' laws that mirror it. For how this plays out on state and local work, see QBS for state and local AEC work.
What it means for your submission
- On QBS pursuits, do not include price unless the solicitation explicitly asks - lead with qualifications mapped to the criteria
- On low-bid work, precision and completeness of the priced bid (and meeting responsibility requirements) is the game
- Design-build can blend both: a qualifications shortlist followed by a priced technical proposal
- Always confirm the regime from the solicitation before deciding what to submit
Best-value: the middle ground
Low bid and QBS are not the only two options. Many procurements use a best-value tradeoff, where the owner weighs technical merit and price together and may pay more for a stronger proposal. Best-value is common for construction and for combined design-and-construction work, and it explains why 'not low bid' does not automatically mean 'no price.' The distinction that matters for A-E design is narrower: under QBS, price is not part of the initial selection at all - it is negotiated only after the qualifications ranking.
Where design-build fits
Design-build blends the models. A typical two-step design-build pursuit uses a qualifications shortlist first - firms submit qualifications, the owner shortlists the most qualified teams - and then asks shortlisted teams for a technical and price proposal evaluated on best value. So the same project can be qualifications-based at the shortlist stage and price-sensitive at the award stage. See design-build for how that delivery method shapes the pursuit.
Why the Brooks Act put design on QBS
The reasoning behind qualifications-first selection is a lifecycle-cost argument. Design fees are typically a small percentage of a project's total cost, while the design itself determines the far larger construction and long-term operating and maintenance costs. Selecting the cheapest designer can produce a design that costs more to build, operate, and maintain - erasing any upfront fee savings. Congress codified qualifications-based selection for federal A-E services in the Brooks Act on exactly this logic, and most states adopted 'mini-Brooks' laws for the same reason.
How to tell which method a solicitation uses
- It publishes evaluation criteria and asks for qualifications with no price - that is QBS; do not volunteer fee
- It asks for a sealed price bid against fixed plans and specs - that is low-bid; precision and completeness win
- It scores technical merit and price together - that is best-value; both your approach and your price matter
- It shortlists on qualifications, then asks shortlisted teams for a priced proposal - that is a two-step or design-build process
- When in doubt, the solicitation's evaluation section tells you exactly how award will be made - read it before deciding what to submit
How fee is negotiated after a QBS selection
Selection is only the first half of QBS. Once the board ranks firms, the owner enters into fee negotiation with the top-ranked firm alone. The owner typically prepares an independent estimate of what the work should cost, then negotiates scope, staffing, and price against that estimate to reach a fee it considers fair and reasonable. If the two sides cannot agree, the owner formally ends negotiations, sets that firm aside, and opens negotiations with the second-ranked firm - and so on down the list. This is why QBS does not mean cost is ignored: it means cost is settled through negotiation with the best-qualified team rather than treated as the basis of award.
Negotiation is scope, not just a number
Fee negotiation is where the owner and firm align on actual scope, level of effort, and staffing. A well-scoped SOQ that clearly ties your team to each requirement makes the later negotiation faster, because both sides already understand what the work involves.
On-call, IDIQ, and master-services contracts
A large share of professional design work is awarded not for a single named project but through on-call, indefinite-delivery/indefinite-quantity (IDIQ), or master-services agreements. The owner uses QBS to select and rank one or more firms for a category of work over a set term, then issues individual task orders against those agreements as specific needs arise. For firms, this changes the pursuit: you are demonstrating that your team can handle a range of assignments over time, not just one scope. Because these agreements can generate steady work for years, the qualifications submission carries a lot of weight - and price, where it enters at all, is usually negotiated per task order rather than bid up front.
CM at-risk and progressive design-build
Two delivery methods sit between pure QBS and pure price competition, and both often begin with a qualifications-first selection. Construction manager at-risk brings a builder on early - frequently chosen substantially on qualifications - to advise during design and later commit to a guaranteed maximum price. Progressive design-build selects a design-build team primarily on qualifications, then develops the design and price collaboratively with the owner in phases, rather than fixing a price at the outset. In both, the early selection resembles QBS even though price is negotiated or established later. For A-E firms, the takeaway is the same: on the front end you compete on team, experience, and approach, not on a bid.
Two-step sealed bidding as a hybrid
Two-step sealed bidding is a hybrid worth recognizing so you do not mistake it for QBS. In the first step, firms submit technical proposals that the owner evaluates and accepts or rejects, usually without price. In the second step, only firms with acceptable technical proposals submit sealed price bids, and the award goes to the low bidder among them. Unlike QBS, price is the deciding factor at the end - the technical step only screens who is allowed to bid. It suits well-defined work where the owner wants some technical assurance before letting price decide, and it is a reminder that a technical-first stage does not automatically make a procurement qualifications-based.
What an owner actually gets from QBS
From the owner's side, QBS is a way to buy judgment. Because professional design is not fully defined before a firm is hired - the firm helps define it - the owner benefits from selecting the team most capable of solving the problem, then negotiating a fee for the scope they jointly settle on. This tends to reduce disputes over what was and was not included, because scope and price are worked out together rather than locked to an incomplete bid. It also lets owners weigh factors that a price bid cannot capture: relevant experience, key personnel, approach, and past performance. Understanding what the owner is trying to get out of QBS is the clearest guide to what belongs in your submission.
Win on qualifications
Flodoc extracts the evaluation criteria from a QBS solicitation and matches your staff and past projects to each factor, so your SOQ or SF330 is built to how the board scores - not to a generic firm brochure.