Construction Procurement: How projects are designed and built
Construction procurement is the process of selecting and engaging the designers, contractors, and suppliers who turn a project from a concept into a finished building or piece of infrastructure. Procurement in construction covers how the owner of the project structures contracts, how work is priced, how risk is allocated, and how the supply chain is brought together. The procurement route an owner chooses tends to shape the budget, the schedule, and the working relationships across a project, so the decision is usually made early and carries through to completion.
So what is procurement in construction at its core? It is the whole approach an owner takes to acquire design and construction services, and it sits alongside related ideas that are sometimes used loosely, including project delivery method, contracting strategy, and tendering. They overlap, but they are not the same thing, and the distinctions matter when a project is being set up.
What is procurement in construction?
In practice, construction procurement refers to the whole approach an owner takes to acquire design and construction services. It answers a few connected questions: who holds the contracts, in what sequence the work is designed and built, how the contractor is paid, and where the financial risk lands when costs or conditions change.
A procurement strategy is generally developed once an owner has a clear enough sense of project objectives, budget, and timeline. Industry guidance from bodies such as the International Federation of Consulting Engineers (FIDIC) emphasises that this strategy tends to be settled early, since it governs most of the stages that follow, from how a project is tendered to how construction is administered on site.
It can help to separate two layers that often get bundled together. The first is the delivery method, meaning how design and construction responsibilities are organised and contracted. The second is the procurement or tendering route, meaning how a contractor is actually selected and a price is agreed. A single delivery method can be paired with more than one tendering route, which is part of why the field can seem more complicated than it is.
Common construction procurement methods
Most projects are delivered through one of a handful of recognised methods. Each one distributes design authority, construction risk, and schedule control differently, and each tends to suit certain kinds of projects better than others.
Design-bid-build
Design-bid-build is the traditional and a commonly used approach. The process is linear: first, the owner hires an architect to design the full set of plans. Once the design is complete, the project is put out for bid, and the contract is typically awarded to the lowest responsible bidder.
Under this method, the owner generally holds two separate contracts, one with the designer and one with the contractor. With construction documents substantially complete before pricing, this route tends to offer strong cost certainty at the point of bid. The trade-off is time. The phases run in sequence rather than overlapping, which usually makes for a longer overall programme and this approach tends to fit well-defined projects where the scope is unlikely to change and where competitive bidding is a priority.
Construction manager at risk
Construction manager at risk, often shortened to CMAR or CM/GC, brings the builder into the process earlier. Construction management at risk is a delivery method in which the construction manager commits to completing the project within a guaranteed maximum price (GMP).
During design, the construction manager tends to act as an adviser to the owner, offering input on cost, constructability, and scheduling. The manager then provides a guaranteed maximum price and assumes construction risk in a way that resembles a general contractor holding the trade subcontracts. This early collaboration can surface design issues before they reach the site. The guaranteed price does shift risk onto the construction manager, who may be exposed to the cost of unforeseen site conditions, procurement delays, or late design changes. Governments in particular appear to be warming to CMAR as an alternative to the traditional route.
Design-build
Design-build consolidates design and construction under a single contract. The Design-Build Institute of America (DBIA) defines this as the method where a single entity provides both design and construction services under one contract with the project owner.
With one entity responsible for the whole project, communication tends to be more direct and the schedule can be compressed, since design and construction can overlap. Federal procurement of design-build is governed by FAR Subpart 36.3, which establishes two-phase selection procedures for federal agencies. The route is often chosen by owners who want a single point of accountability and faster delivery. Some owners feel they pay a premium for selecting the team before the design is fully developed, which is part of the ongoing debate about when this method is the right fit.
Integrated project delivery
Integrated project delivery, or IPD, is a more collaborative arrangement that is distinct from the methods above. It is built around a multi-party agreement signed by the owner, the designer, and the builder, who share both the risk and the reward of the project under a single contract. The American Institute of Architects (AIA) publishes a standard IPD agreement, the AIA C191, that formalises this multi-party structure.
The intent is to align everyone's incentives from the outset, so that savings and overruns are shared rather than fought over. Adoption appears to remain limited, in part because many owners are still reluctant to share project risk even where they would like the benefits of closer collaboration.
Job order and multiple award contracting
For owners with recurring work, two umbrella approaches tend to streamline procurement. Job order contracting (JOC) suits repetitive, small-to-medium projects, using preset pricing and a simplified procurement process. Multiple award task order contracts (MATOC) allow several contractors to compete for individual task orders under one overarching contract, which can offer flexibility for large or open-ended delivery programmes.
Procurement routes and tendering
Layered on top of the delivery method is the question of how a contractor is selected and how a price is reached. This is where tendering routes come in.
A single-stage tender is the more straightforward route. The design is developed to a reasonably complete level, and contractors then submit a price, often a lump sum, against that information. It works well when the scope is well understood and the owner wants competitive pricing on a defined package of work.
A two-stage tender brings the contractor in earlier and splits the appointment into phases. A two-stage tender is a procurement route in which the client appoints a contractor in two phases: first, at Stage 1, by selecting a preferred contractor based on capability, methodology, team, programme, and limited commercial inputs. The contractor is then typically engaged under a pre-construction services agreement to provide early input and help develop the design and final pricing before construction begins. This route tends to be used where collaboration and early contractor involvement are valued, though it requires careful management to keep the eventual price competitive.
Early contractor involvement is closely related and is sometimes formalised within standard contract frameworks. The NEC suite, for example, offers an early contractor involvement option that has the parties contract on a two-stage basis, with scope and price developed in the first phase before the construction phase proceeds.
Construction contracts and standard forms
Procurement and contracting are tightly linked, since the chosen route is given legal effect through a contract. Several standard forms are widely used across the industry, and the choice tends to reflect project type, location, and the preferences of funders and sponsors.
FIDIC contracts are common on international infrastructure and engineering projects. NEC contracts, including the Engineering and Construction Contract, are known for an emphasis on active project management. AIA documents are a familiar reference point across a range of delivery methods. On major engineering, procurement, and construction projects, owners may use FIDIC, bespoke arrangements, or industry-specific forms depending on the sector.
The pricing structure usually lives within these contracts, whether that is a lump sum, a guaranteed maximum price, a cost-reimbursable arrangement, or a schedule of rates. The structure an owner selects tends to follow from how much design certainty exists at the point of contract and how the owner wants risk to be shared.
How procurement decisions tend to be made
There is no single best route, and the suitable choice tends to depend on the balance an owner is trying to strike. Cost certainty, schedule speed, design control, and risk appetite all pull in different directions, and a method that maximises one often gives up some of another.
Where early cost certainty matters most and the scope is settled, design-bid-build remains a natural fit. Where speed is the priority and the owner wants a single point of accountability, design-build is often favoured. Where an owner wants collaboration and early input but still values a price commitment, CMAR or a two-stage route may be considered. Project complexity, the maturity of the design, the regulatory environment, and the owner's own capacity to manage the process all tend to feed into the decision.
Technology has become part of this picture as well. Platforms such as Procore and Autodesk are used to administer contracts and manage documentation across delivery methods, and the way a project is procured can influence how it is documented and run day to day.
Conclusion
Construction procurement is less a single decision than a connected set of choices about delivery method, tendering route, contract form, and pricing structure. These choices interact, and the route that suits one project may be a poor fit for another with different priorities. For founders and teams building tools for the construction industry, understanding how owners weigh cost, speed, risk, and control helps explain why the procurement landscape looks the way it does, and where friction in the process tends to sit.
Frequently asked questions
What is the difference between procurement and project delivery method?
A project delivery method describes how design and construction responsibilities are organised and contracted, such as design-bid-build or design-build. Procurement is the broader process that includes the delivery method along with how the contractor is selected and the price is agreed.
What is the difference between single-stage and two-stage tendering?
In single-stage tendering, contractors price a largely complete design in one round, often as a lump sum. In two-stage tendering, a contractor is appointed early based on capability and limited commercial inputs, then helps develop the design and final price before construction starts.
What is a guaranteed maximum price?
A guaranteed maximum price is a pricing arrangement in which the contractor or construction manager commits to delivering the project for no more than a set figure. It is commonly associated with construction manager at risk, where the manager takes on the risk of costs above that figure.
Which procurement method is best?
There is no universally best method. The suitable choice tends to depend on the project's priorities around cost certainty, schedule, design control, and how much risk the owner is willing to share, as well as the complexity and maturity of the design.
What trade-offs typically separate design-bid-build from design-build?
Design-bid-build tends to maximise cost certainty at the point of bid, since pricing is based on substantially complete construction documents, but it usually results in a longer overall programme as design and construction proceed sequentially. Design-build offers a single point of accountability and can compress the schedule by overlapping design and construction, though some owners feel they pay a premium for selecting the team before the design is fully developed.
What does a guaranteed maximum price (GMP) in CMAR actually shift in terms of risk?
Under CMAR, the construction manager advises during design, then commits to a GMP and assumes construction risk similar to a general contractor holding trade subcontracts. The GMP shifts exposure to the construction manager for costs above the cap, including potential impacts from unforeseen site conditions, procurement delays, or late design changes. Early collaboration in CMAR is intended to surface and mitigate such risks before they reach the site.
When is two-stage tendering or early contractor involvement a good fit?
It tends to suit projects where collaboration and early builder input are valued, such as when scope is evolving or constructability and phasing choices will drive outcomes. In Stage 1, a preferred contractor is chosen on capability, approach, programme, and limited commercial inputs, then engaged under a pre-construction services agreement to help develop design and final pricing before construction. It requires careful management to keep the eventual price competitive. Early contractor involvement can also be formalised within standard suites like NEC.