Find Design Inconsistencies Before They Find You

Written by Alexander Michalatos, CEO & Co-Founder, Buildcheck

Salesforce Transit Center had issues with cracking due to undersized steel girders. The design error was caught post-opening, shutting down the otherwise brand-new hub.^[1]

There was a time when a Robert Moses-era highway project could barrel through design and construction on sheer momentum — fewer trades, simpler systems, less documentation. That era is gone. Today's projects involve dozens of consultants, hundreds of sheets, and mechanical, electrical, plumbing, and fire protection systems that are deeply interdependent. The documents that describe these systems are where coordination either holds together or quietly falls apart.

A 1964 Parks Department map of Robert Moses projects. Many were never completed — but the ones that were could move from design to construction with a directness that today's multi-discipline, multi-consultant projects can only envy.

And when it falls apart, the numbers are staggering. According to HKA's 2024 CRUX Insight report, construction overages driven largely by design errors now total an estimated $500 billion annually worldwide.^[3] Meanwhile, research shows that 20–30% of a typical project's budget goes to non-physical, indirect "soft costs" — preconstruction, design management, coordination, RFIs, rework — representing a massive surface area for automation and process improvement.^[4]

The takeaway: the biggest coordination failures don't come from one obviously wrong sheet. They come from small inconsistencies spread across dozens of sheets that nobody catches until steel is going up or concrete is being poured.

What Cross-Sheet Inconsistencies Actually Look Like

Not all drawing errors are created equal. Some are dimensional nuisances. Others can shut down a building.

Critical system failures. The most expensive inconsistencies are the ones that affect life safety and core building systems. Missing electrical feeds to fire pumps. Fire-rated door assemblies spec'd at 30 minutes on the architectural drawings but requiring 90 minutes per the fire protection plan. Storm and sanitary invert elevations on the civil drawings that don't match the plumbing engineer's connection points. Missing scope — an entire system or assembly that one discipline assumed another was covering, but nobody actually detailed. These aren't hypothetical. They're the issues that generate six-figure change orders and multi-week delays.

Specification-to-drawing conflicts. The specifications call for one concrete mix design; the structural notes call for another. The spec requires a specific reinforcement grade that contradicts the bar bending schedule. These conflicts often hide until procurement or placement.

Dimension and geometry conflicts. A footing dimension on the structural plan doesn't match the detail sheet. A column grid line drifts between the architectural and structural drawings. Common when design teams work in parallel and coordinate imperfectly before issuing documents.

Broken references and callouts. A plan view references "See Detail 3/S-5," but Detail 3 on Sheet S-5 has been renumbered, doesn't exist, or shows something unrelated. Broken references are among the most frequent inconsistencies and force field crews to stop work and improvise.

Building an Organizational Design Review Practice

A repeatable design review SOP turns ad-hoc quality checks into organizational capability

Catching these issues is valuable. But the real question is how an organization builds a repeatable process — a design review SOP — so that catching them becomes standard practice rather than heroic individual effort.

Several large owners and developers have already moved in this direction. A major U.S. developer we work with for example, found that roughly a third of their change orders originated from design errors and omissions, which led them to mandate independent third-party design reviews on all projects above a certain threshold. The results spoke for themselves in reduced rework and fewer field surprises.

Here's a framework any contractor or owner can adapt:

1. ‍Track the sources of unexpected cost. Before you can fix the problem, you need to see it clearly. Use your project management platform — Procore, ACC, whatever your team runs on — to categorize the root cause of every change order, RFI, and rework event. Was it an owner-driven change? A design error? Unforeseen site conditions? Missing scope? Break it down by asset type, region, project size, and trade.
2. ‍Analyze where your organization hurts the most. The data will tell you. Maybe MEP coordination is your consistent weak spot. Maybe it's civil-to-structural interfaces on highway work. Maybe smaller projects slip through without adequate review because they don't feel complex enough to justify the effort. Identify the patterns.
3. ‍Develop targeted SOPs. One-size-fits-all review checklists rarely work. Develop standard operating procedures that are specific — by project type, by region, by the scopes that consistently generate problems. A multifamily developer's SOP will look different from a heavy civil contractor's.
4. ‍Choose the right review approach — and the right tools. The SOP might call for an in-house review task force, external third-party reviewers, structured checklists, or AI-powered plan review tools that can scan hundreds of sheets for cross-discipline conflicts in minutes rather than weeks. Increasingly, firms are using a combination. The manual expertise sets the standard; the technology scales it.
5. ‍Train, monitor, and iterate. Roll out the SOP, track whether RFI counts and change order rates actually decrease, and refine. The firms that treat design review as a living process — rather than a one-time initiative — are the ones that sustain the gains.

AI-powered plan review tools can now flag cross-sheet inconsistencies that would take a human reviewer hours to find.

Why It Matters for Schedule and Margin

Every RFI that results from a drawing inconsistency carries a cost beyond the direct rework. Industry data consistently shows average RFI turnaround times of one to two weeks. During that window, dependent work may be on hold, crews get redirected, and out-of-sequence construction introduces its own risks.

For contractors running net margins in the low single digits, the math is unforgiving. If a $50 million project generates one hundred RFIs and even a fraction stem from cross-sheet inconsistencies, the accumulated administrative cost, delay exposure, and rework quickly erode the margin that was already thin. The Construction Industry Institute's body of research on front-end planning has consistently shown that investing in document quality before construction yields returns on the order of ten to one compared to fixing problems in the field.

The drawings will never be perfect. But organizations that build systematic review processes — supported by the right expertise and the right technology — shift from reactive problem-solving to proactive risk management. The inconsistencies are in the documents. The question is whether your organization finds them before the first piece of equipment rolls onto the site, or after.

Sources

1. Morris, D. P. (2018, September 25). The Transit Center in San Francisco [Photograph]. Bloomberg.
2. New York (N.Y.). Department of Parks. (1964). 30 years of progress, 1934–1964: Department of Parks [Illustration]. Flickr.
3. HKA. (2024). CRUX Insight 2024: Changing the Narrative.
4. Anireddy, A. R. (2023). "Challenges of estimating soft costs in construction: Identifying and quantifying non-material expenses."‍
5. BuildCheck. (2026). AI-Powered Cross-Sheet Issue Detection [Software screenshot]. BuildCheck.

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Note: An adapted version was published in California Builder & Engineer.