Construction Project Delivery Methods Compared: CMAR, IPD, GC/CM & More | Projul

If you have been in construction long enough, you know that the way a project gets delivered matters just as much as what gets built. The delivery method shapes who carries risk, when pricing gets locked in, how the design team and the builder work together, and whether problems surface early or blow up during construction.

Most contractors are comfortable with the traditional design-bid-build model. An architect draws the plans, the owner puts them out to bid, and the low bidder builds it. Simple enough. But that model is just one option, and it is not always the best one.

This guide breaks down the major project delivery methods side by side so you can understand where each one fits, what the tradeoffs look like, and how to position yourself when owners are deciding which path to take.

CM at Risk (CMAR): Early Involvement, Shared Accountability

Construction Manager at Risk, usually shortened to CMAR or CM at Risk, is a delivery method where the construction manager joins the project during preconstruction and eventually takes on financial responsibility for delivering the project within a Guaranteed Maximum Price (GMP).

Here is how it typically works:

• The owner selects a CM at Risk firm based on qualifications, experience, and sometimes a fee proposal (not a hard bid on construction costs).
• The CM works alongside the architect during design, providing cost estimates, constructability reviews, and scheduling input.
• At some point during the design process (often around 60-90% design completion), the CM provides a GMP.
• Once the GMP is accepted, the CM at Risk firm essentially becomes the general contractor, self-performing some work and subcontracting the rest.
• If the project comes in under the GMP, savings are typically shared between the owner and the CM. If it goes over, the CM eats the difference.

Why owners like it: They get a contractor’s input during design, which catches problems early. They also get cost certainty through the GMP before construction starts.

Why contractors like it: You are selected on qualifications instead of being the lowest bidder. You have real influence over the design and schedule. And the GMP structure means you keep a share of savings when you run the job well.

Where it fits: Public projects, institutional work (schools, hospitals, municipal buildings), and large commercial projects where the owner wants early contractor involvement but also wants a price ceiling.

Understanding construction contract types is critical here because the GMP is just one pricing structure, and knowing how it compares to lump sum or cost-plus contracts will help you explain the tradeoffs to owners.

Integrated Project Delivery (IPD): True Partnership With Shared Risk

IPD is the most collaborative delivery method in construction, and also the most demanding. In an IPD arrangement, the owner, architect, and contractor sign a single multi-party agreement and share both the risks and the rewards of the project.

The key features that set IPD apart:

• Multi-party contract. All three primary parties (owner, designer, builder) sign one agreement instead of separate bilateral contracts.
• Shared risk pool. Each party puts a portion of their profit at risk. If the project hits its targets, everyone earns their full profit (and sometimes a bonus). If the project overruns, everyone takes a proportional hit.
• Open-book accounting. All costs are transparent. No hidden markups, no burying profit in change orders. Everyone sees everything.
• Collaborative decision-making. Major decisions are made jointly. No one party can unilaterally drive the project in a direction that hurts the others.
• Target cost instead of GMP. The team sets a target cost together during design. The incentive structure rewards the whole team for beating that target.

Why owners like it: The shared incentive structure means the contractor and architect are genuinely motivated to solve problems instead of pointing fingers. Waste gets reduced because everyone benefits from efficiency.

Why contractors like it (when it works): You have a real seat at the table from day one. You are not just a builder following orders. Your expertise in preconstruction planning and constructability actually gets valued and compensated.

Why some contractors avoid it: The open-book requirement means your margins are visible to everyone. The shared risk pool means a bad design decision can cost you money even if you did nothing wrong. And the administrative overhead of running an IPD project is significant.

Where it fits: Large, complex projects with experienced owners who understand collaborative contracting. Healthcare facilities, higher education, and major corporate campuses are the most common IPD project types. The owner needs to be sophisticated enough to participate actively in the process.

IPD is not for every project or every contractor. But if you can get comfortable with transparency and shared accountability, it can be one of the most rewarding ways to deliver a project.

Progressive Design-Build: Qualifications First, Price Second

Traditional design-build bundles design and construction under one contract. The owner picks a design-build team (often through a competitive proposal process), and that team handles everything from concept through completion. It is a great model, and we have a full breakdown in our design-build project delivery guide.

Progressive design-build takes that concept and adds a critical twist: the owner selects the design-build team based on qualifications first, then works through design phases together before agreeing on a final price.

The process usually looks like this:

1. The owner issues a Request for Qualifications (RFQ) and selects a shortlist of design-build teams.
2. The selected team enters a Phase 1 agreement covering preconstruction services, preliminary design, and cost modeling.
3. During Phase 1, the team develops the design to a point where both sides can agree on a fair price.
4. If the owner and the design-build team agree on the price, they execute a Phase 2 agreement for construction.
5. If they cannot agree, the owner has an “off-ramp” and can take the Phase 1 work product to another builder.

Why owners like it: They pick the best team, not the cheapest proposal. The price is based on real design work, not assumptions made during a competitive bid. And the off-ramp protects them if the team cannot deliver a fair price.

Why contractors like it: You compete on what you are good at (experience, approach, team) instead of racing to the bottom on price. You get paid for preconstruction work in Phase 1. And by the time you price Phase 2, you actually understand the project well enough to give a fair number.

Where it fits: Public infrastructure, water/wastewater, transportation, and increasingly in vertical construction. Progressive design-build is growing fast in markets where owners have been burned by the “best value” selection process that still heavily weights price.

Handling change orders is much smoother in progressive design-build because both parties have a shared understanding of scope before the price gets locked.

GC/CM (General Contractor/Construction Manager): A Public Sector Hybrid

GC/CM is a delivery method used primarily in public construction, particularly in states like Washington where it is specifically authorized by statute. It is similar to CM at Risk in many ways, but the terminology and legal framework differ depending on the jurisdiction.

Contractors across the country trust Projul to run their businesses. Read their reviews.

In a GC/CM arrangement:

• The owner selects a GC/CM firm through a qualifications-based process (sometimes with a fee component).
• The GC/CM provides preconstruction services: estimating, scheduling, constructability review, and value engineering.
• The GC/CM negotiates a Maximum Allowable Construction Cost (MACC) with the owner.
• The GC/CM self-performs some work and competitively bids subcontractor packages.
• The GC/CM carries the risk for delivering the project within the MACC.

The main difference between GC/CM and CM at Risk is often just the legal and procurement framework. In some states, “CM at Risk” is the standard term. In others, “GC/CM” is the statutory designation. The mechanics are very similar.

Why it matters for contractors: If you work in public construction, you need to understand how your state handles alternative delivery. Some states have reliable GC/CM or CMAR statutes. Others are still stuck in low-bid-only procurement. Knowing the landscape helps you target the right projects and position your firm accordingly.

Contractors who want to move into GC/CM work need strong risk management capabilities because the MACC puts real financial exposure on your plate during construction.

How Each Method Handles the Big Three: Risk, Cost, and Schedule

Let us put these methods side by side and look at how they handle the three things every owner (and contractor) cares about most.

Risk allocation:

• Design-bid-build: The contractor carries construction risk. The owner carries design risk. Clear separation, but that separation can create finger-pointing when things go wrong.
• CM at Risk / GC/CM: The contractor carries construction risk through the GMP or MACC. But because the contractor was involved in design, there are fewer surprises. Risk is better understood before it becomes a problem.
• Design-build (traditional): The design-build team carries both design and construction risk. The owner has less control but also less exposure.
• Progressive design-build: Similar risk transfer to traditional design-build, but the progressive pricing process means both sides understand the risk better before committing.
• IPD: Risk is shared explicitly through the multi-party agreement. No one is entirely off the hook, and no one is holding all the exposure alone.

Cost certainty:

• Design-bid-build: The owner knows the price after bidding, but not during design. Changes during construction can blow the budget through change orders.
• CM at Risk / GC/CM: The GMP or MACC provides a cost ceiling during design development. The owner gets price feedback throughout the process.
• Design-build: The owner knows the price at proposal time (traditional) or after Phase 1 (progressive). Both provide earlier cost certainty than design-bid-build.
• IPD: The target cost is developed collaboratively. Cost certainty builds gradually as the team refines the design together.

Schedule:

• Design-bid-build: Sequential. Design finishes, then bidding, then construction. Slowest overall timeline.
• CM at Risk / GC/CM: Allows fast-tracking. Construction can begin on early packages while design continues on later phases.
• Design-build: Naturally supports fast-tracking because design and construction overlap under one contract.
• Progressive design-build: Slightly slower start than traditional design-build because of the two-phase selection, but still faster than design-bid-build.
• IPD: Schedule is collaboratively managed. Fast-tracking is possible and often built into the project plan.

If you are running multiple projects with different delivery methods, having solid construction project management software becomes even more important because each method has different tracking and reporting requirements.

Helping Owners Choose the Right Delivery Method

This is where you add real value as a contractor. Most owners, especially those who only build once or twice in their lifetime, do not know the difference between these delivery methods. They rely on their architect, their attorney, or (ideally) their contractor to guide them.

Here is a practical framework for the conversation:

Start with their priorities. Ask the owner what matters most: speed to completion, cost certainty, design quality, control over the process, or minimizing risk. Most owners will say “all of the above,” but push them to rank their top two. That ranking points you toward the right method.

Match the method to the project, not the owner’s comfort level. A small tenant improvement does not need IPD. A $50 million hospital should not be low-bid design-bid-build. The project characteristics (complexity, size, timeline, regulatory requirements) should drive the delivery method selection.

Be honest about your capabilities. If you have never delivered a CMAR project, do not pitch it just because the fee structure is attractive. Owners can tell when a contractor is outside their depth. Build your preconstruction capabilities first, then pursue CMAR and GC/CM work.

Explain the tradeoffs plainly. Owners do not need a lecture on procurement law. They need to understand: “If we go this route, you will know the price sooner but have less control over design details. If we go that route, you will have more control but the price will not be locked until later.” Keep it simple and honest.

Consider the owner’s experience level. A sophisticated repeat-builder can handle IPD or progressive design-build. A first-time owner building a single facility probably needs the simplicity of design-bid-build or the guided experience of working with a design-build team. Match the method to the owner’s ability to participate in the process.

Think about the local market. Some delivery methods are common in certain regions and rare in others. If your local subcontractor market is not used to open-book GMP work, a CMAR project might face resistance from subs who are used to hard bids. Know your market before recommending a delivery method.

The contractors who win the best projects are not always the cheapest. They are the ones who can sit across the table from an owner and say, “Based on what you have told me about this project, here is the delivery method I would recommend, and here is why.” That conversation positions you as a trusted advisor, not just another builder waiting for plans to bid on.

Understanding construction bidding strategies across different delivery methods gives you flexibility. Some methods are fee-based selections. Others are competitive bids. Knowing how to compete in each environment keeps your pipeline full regardless of which delivery methods dominate your market.

The construction industry is slowly moving away from the default of low-bid design-bid-build toward methods that bring contractors in earlier, distribute risk more fairly, and produce better outcomes for everyone involved. The contractors who understand these delivery methods and can explain them clearly to owners will have a significant edge in winning work and building better projects.

Ready to stop guessing and start managing? Schedule a demo to see Projul in action.

Pick the delivery methods that match your firm’s strengths, invest in the preconstruction capabilities they require, and start having these conversations with owners before they default to the same old approach. That is how you grow a construction business that wins on value, not just price.