Design-Build Is Not Enough: Only Real Collaboration Delivers

Gil Rosa
Jul 24, 2025
3 min read

Every firm and every project pitch touts "collaboration."

Every RFP echoes the promise: design-build will fix the chaos, break the silos, and create a seamless team.

But if you've spent any time in the field, you know the story isn't so simple.

The Data: Project Performance Still Lags

Recent global studies indicate that more than 50% of project owners have experienced at least one underperforming construction project—and in the U.S., this number rises to 61%.

Only 31% of projects are delivered within 10% of their original budget—and a paltry 25% finish within 10% of their original schedule.

A note on context:

That 50% cost overrun figure applies specifically to design-build projects. In some research, projects using traditional design-bid-build (DBB) achieved better schedule performance than those using design-build (DB), for example, see:

"Study the Delays and Conflicts for Construction Projects and Their Mutual Relationship: A Review" by Mahamid, Alexandria Engineering Journal, 2022.

Does Design-Build Deliver on Its Promise?

It's complicated.

On one hand, design-build outperforms design-bid-build on several fronts:

DB projects finish 33% faster than DBB, on average.
DB projects show 6% less cost growth than DBB.
Quality ratings are about 10% higher in DB than DBB.

But here's the other side:

More than 50% of DB projects still go over budget.
In practice, design often becomes subordinated to construction priorities, with owners losing an independent advocate for design quality.
In some cases, DBB has delivered better schedule performance than DB, challenging the assumption that design-build always means faster completion (see Mahamid, 2022).

Root Cause: Communication and Collaboration Breakdown

Here's the unvarnished truth:

Poor communication and weak collaboration are the primary causes of most project failures, regardless of the delivery method.

More than half of all project budget risk is due to ineffective communication, misaligned information, and unstructured collaboration.

Cost, schedule, and quality issues are almost always symptoms of a deeper breakdown in trust, alignment, and shared accountability.

The Next Evolution: Integrated Project Delivery (IPD)

The industry is evolving.

The best results now come from Integrated Project Delivery (IPD), a model that not only puts people under the same contract but also aligns incentives, mandates joint decision-making, and shares risk and reward from day one.

Studies show that IPD projects outperform both DB and DBB in terms of cost, schedule, and owner satisfaction across all project types, regions, and teams.
IPD projects show "striking uniformity of success," with high performance regardless of project size or scope.

But let's be real:

IPD is best suited for complex projects that span over 12 months and have multi-million-dollar budgets.
It requires significant upfront investment, new contract structures, and a genuine cultural shift; this is not a plug-and-play solution.

So what makes collaboration "structured"?

It's not just "being friendly" or having more meetings. Structured collaboration means clear protocols for decision-making, formalized communication routines, transparent risk-sharing, and systems that keep everyone accountable, not just handshakes and good intentions.

What's the real lesson?

The delivery method matters, but the quality of collaboration matters more. The best contract in the world won't save a team that's not aligned, honest, and committed to working through conflict together.

What This Means for Builders, Architects, and Owners

If you're still treating collaboration as a checkbox or a buzzword, your projects will continue to fall into the same traps—no matter what the contract says.

If you want results:

Invest in real, structured collaboration from the start.
Align risk and reward, don't just share the work.
Demand honest communication and regular alignment, not just "team meetings."
Hold everyone, including yourself, accountable for the outcome, not just your piece.

Bottom Line:

Design-build is better than the old ways, but it's not enough. Only disciplined, structured collaboration delivers projects that finish on time, on budget, and at the level of quality everyone deserves.

If you want to build this kind of culture, start with a GRPM "Project Clarity" session.

Let's stop playing the contract game and start building projects (and teams) that work. MAKE THE CALL ☎

Key Sources: