Integrated project delivery (IPD) is not one thing. In construction, the term can describe a set of collaborative working practices, or it can mean a specific multiparty contract in which the owner, designer, constructor and sometimes other participants sign one agreement, share defined risks and rewards, and govern the project together. A project can use IPD-style collaboration without using that contract.
That distinction matters when an owner is comparing IPD with design-build. The delivery method determines who contracts with whom, how the team is selected, who makes decisions, what price and schedule commitments exist, and where ultimate accountability sits. The right choice depends on project goals, procurement rules, the owner’s capacity to participate and the contract’s actual language—not on the label alone.
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What IPD means in construction
Integrated delivery as a working approach
In its broad sense, integrated project delivery means bringing key participants into the process from project inception through completion and coordinating their decisions around shared project goals. The practices may include early trade involvement, joint design decisions, target-value design, open information exchange, shared planning and incentives tied to project performance.
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IPD as a multiparty contract
In the narrower contractual use, the owner, constructor, designer and potentially other key participants enter one agreement. That agreement sets out the parties’ roles, governance, compensation, risk-sharing and reward-sharing. It may limit certain claims among the participants and establish a committee that seeks unanimous decisions.
Those features are characteristics of the multiparty model described by DBIA, not automatic terms for every project marketed as “IPD.” The contract controls. Before relying on a promise of shared savings, liability protection, unanimous governance or a particular guarantee, read the proposed agreement and its exhibits with construction counsel.
Why the distinction changes an owner’s decision
Calling a project collaborative does not tell you how it is procured or who carries financial exposure. An owner may obtain many integration benefits—such as early constructability input or target-cost planning—under a conventional prime-contract, construction manager or design-build structure. Conversely, signing a multiparty agreement does not guarantee that the participants will communicate well or make timely decisions.
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DBIA’s owner guidance frames delivery strategy as three connected choices:
- Core-team organization: which organizations participate, when they join and how their responsibilities connect.
- Payment and reimbursement: how costs, fees, contingencies, savings and overruns are calculated and paid.
- Team assembly: how the owner evaluates qualifications, experience, cultural fit and other selection criteria.
The owner should define the project’s goals before selecting a structure, then align procurement, contract terms and team behavior with those goals. During implementation, the owner still has to encourage integration and build team cohesion; the agreement cannot do that work by itself.
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How a multiparty IPD arrangement is organized
One agreement, several key participants
The defining structural difference from a conventional arrangement is that the owner contracts in the same agreement with at least the designer and constructor, and possibly major trade contractors, consultants or other participants. The agreement can establish a common project objective, a shared cost model and procedures for adding participants.
Because the exact parties and obligations vary, an owner should ask whether a proposed “IPD” agreement actually includes the designer and constructor as co-signatories, how lower-tier firms are brought into the risk-and-reward structure, and which obligations remain outside the multiparty agreement.
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Governance and decision-making
Multiparty IPD commonly uses a management or core group representing the principal participants. DBIA’s description contemplates a committee seeking unanimous decisions. The owner remains the ultimate decision maker if the participants cannot agree, so the agreement should specify escalation, time limits, voting rights, dispute procedures and the effect of an unresolved decision on cost and schedule.
That governance model can surface issues earlier because the people who design, price and build the work are in the same decision forum. It can also slow a project if the group lacks authority, if every issue is escalated, or if the owner is unavailable to decide.
Shared risk, reward and liability
A multiparty agreement may place defined costs and incentives in a shared pool. Participants can have a financial reason to reduce rework, protect the target cost and meet project milestones rather than optimize only their own scope. Some agreements also limit claims among the principal parties, subject to negotiated exceptions.
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“Shared risk” is not the same as unlimited collective responsibility. The agreement may preserve separate obligations for negligence, willful misconduct, insurance, safety, intellectual property, payment to lower tiers or other matters. The allocation must be read line by line.
IPD compared with design-build
The following comparison summarizes DBIA’s general descriptions. It is not legal advice, and an individual contract can allocate responsibilities differently.
| Decision point | Multiparty IPD described by DBIA | Design-build described by DBIA |
|---|---|---|
| Contract structure | Owner, constructor, designer and potentially other participants enter the same agreement. | One design-builder contracts with the owner for both design and construction. |
| Team selection | DBIA says a pure qualifications-based selection is essential to the multiparty model. | Selection may be qualifications-based or best value, combining price with non-price qualifications. |
| Owner’s role | The owner helps define the project, manages the process and is the ultimate decision maker when the team cannot agree. | The owner sets performance expectations; the design-builder primarily manages design and construction details, with owner participation varying. |
| Price and schedule | DBIA says the owner does not receive the same price and schedule guarantees from other parties that it typically receives in design-build. | Owners typically receive a price commitment, such as a lump sum or guaranteed maximum price, plus a completion-date commitment. |
| Ultimate accountability | The owner contracts with at least two other parties and retains ultimate accountability and decision risk for the outcome. | The design-builder is the single point of accountability for meeting the owner’s project criteria. |
The difference is not simply “more collaboration” versus “less collaboration.” Design-build can be highly collaborative internally while preserving one external point of accountability. Multiparty IPD distributes the principal relationships and asks the owner to remain deeply involved in decisions.
For context, DBIA announced in October 2023 that it expected design-build to represent 47% of construction projects by 2026. That was an organizational projection about design-build, not a measured IPD adoption rate or proof of performance.
What integration looks like on an actual project
Early participation by builders and trades
Bringing the constructor and key trades into design before documents are complete allows the team to test details for cost, sequencing, availability, safety and fabrication. Early participation is a practice, not proof that a multiparty contract exists. The owner should define which firms join early, what information they receive and how their preconstruction services are paid.
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Target-value design
Instead of designing first and pricing later, the team establishes a target cost and repeatedly tests design choices against it. Cost, function, schedule and quality are considered together. A target is a management tool, not automatically a guaranteed maximum price; the contract must say who bears an overrun and how approved scope changes affect the target.
Colocation and shared information
Some teams colocate participants or create a shared digital workspace so design questions, requests for information, estimates and decisions move quickly. Colocation can improve awareness but adds staffing, technology and travel costs. The useful test is whether the arrangement shortens decision cycles and reduces rework for this project.
Performance incentives
Incentives can reward the outcomes the owner actually values: meeting a target cost, achieving an agreed milestone, reducing defects, improving safety or delivering a specified operational result. Measures should be defined before work starts, with clear baselines, data owners, audit rights and rules for owner-directed changes.
Mutual respect and decision discipline
In a 2014 McGraw Hill Construction SmartMarket report, Gilbane executive Susan Klawans described applying IPD practices under construction manager-at-risk as requiring “mutual respect and trust, mutual benefit and reward, collaborative innovation and decision-making and early involvement of participants.” Those are behavioral conditions, not automatic outputs of a form contract.
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A practical path for evaluating and setting up IPD
- Define measurable project goals. Record the required function, budget, schedule, quality, safety, sustainability and operational outcomes. Identify which goals are fixed and which can trade off.
- Map the decisions and interfaces. List design packages, long-lead procurement, permitting, commissioning and owner-furnished items. Mark where early constructor or trade input can change the result.
- Choose the level of integration. Decide whether the project needs collaborative practices under an existing delivery method or whether the benefits justify a fully multiparty agreement.
- Test procurement and legal constraints. Confirm whether the owner, funding source and jurisdiction permit the planned selection method, contract structure, insurance program and compensation model. Public-procurement rules differ by jurisdiction and can change; obtain current local advice.
- Assemble the core team. Evaluate qualifications, relevant project experience, financial capacity, collaborative behavior and ability to share reliable cost and schedule information. In the multiparty model described by DBIA, qualifications-based selection is central.
- Write the commercial model. Define allowable cost, fee, contingencies, target cost, savings and overruns, audit rights, payment timing, change management and the conditions for incentive payments.
- Write governance before mobilization. Name the core group, decision rights, escalation path, meeting cadence, information standards and the owner’s final-decision authority. Include deadlines so consensus seeking does not become paralysis.
- Plan implementation behaviors. Set expectations for early involvement, open-book estimating, issue tracking, design reviews, safety planning, lessons learned and dispute avoidance. Assign an accountable person for each routine.
- Monitor and adjust. Review cost, schedule, quality, safety and collaboration indicators at agreed intervals. Correct a failing process early rather than assuming the contract’s incentive pool will fix it.
Trade-offs and cautions
The owner must be willing to lead
In multiparty IPD, the owner is not a passive purchaser. The owner helps define the project, participates in process management and may have to decide when the group cannot reach agreement. An organization without available decision makers, reliable cost information or internal alignment may struggle even with an excellent team.
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Less certainty can be a deliberate trade
DBIA’s comparison says multiparty IPD does not provide the same price and schedule guarantees it associates with design-build. That can be acceptable when early collaboration, innovation or complex interfaces are more valuable than a single guaranteed price and date. It is a serious concern when the owner’s financing or public commitment requires a firm cap and completion obligation.
A sophisticated team is essential
Contract language can align incentives, but it cannot manufacture trust, estimating discipline or timely decisions. Skanska project executive Raul Rosales said in the 2014 SmartMarket report: “The terms of an agreement don’t guarantee results, but it requires a high level of sophistication on everyone’s part that improves your odds of success.” The statement is a historical practitioner observation, not a performance guarantee.
Legal and procurement rules are local
Whether a public owner may use a multiparty IPD agreement, a qualifications-only selection or a particular insurance and payment structure depends on current law, agency rules and the project funding source. A general industry position statement cannot establish what is lawful in a particular state or agency. Obtain jurisdiction-specific advice before issuing a solicitation or signing an agreement.
What the available evidence does—and does not—show
DBIA’s owner guide examined 204 capital-facility projects that were substantially complete between 2008 and 2014. It analyzed relationships among delivery strategy, team integration, team cohesion and performance, and concluded that delivery method alone did not determine success. The sample is historical; it is not a current market statistic and does not prove that the IPD label causes better outcomes.
The 2014 SmartMarket report documented different depths of adoption. Some teams used an integrated form of agreement with shared risks and rewards; others used selected IPD practices with fewer formal contractual obligations. Reported examples included early trade participation, target-value design, colocation and performance incentives. These examples show possible implementation patterns, not universal requirements or current prevalence.
When IPD is a sensible fit
IPD deserves serious evaluation when a project has complex interfaces, substantial design uncertainty, opportunities for prefabrication or innovation, and an owner able to participate continuously. It is less attractive when the scope is routine, the owner needs a single point of accountability and firm price and schedule commitments, or procurement rules make the multiparty structure impractical.
- Consider collaborative practices without a multiparty contract when you want early trade input, target-value design or joint planning but need to retain a familiar contract and guarantee structure.
- Consider multiparty IPD when the principal participants can commit to one agreement, open-book information, shared incentives and joint governance, and when the owner accepts a more active role and different risk profile.
- Compare design-build directly when a single entity’s accountability, price commitment and completion-date commitment are central requirements.
The decision should follow the project’s goals and constraints. “IPD” is useful only when everyone can state which practices, contract terms, decision rights and financial consequences the word represents.
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