Deciding late is expensive: digital twins and decision time

Almost everyone assumes a project runs late because construction is slow. In most cases the delay started much earlier, in a meeting where nothing could be decided.

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The size of the problem

McKinsey measured it: large construction projects take about 20% longer than scheduled and run up to 80% over budget. In a review of more than 300 projects with contracts above one billion dollars, cost overruns averaged around 80% and delays around 50%.

Those are megaproject figures, but the mechanism is identical in an eighty-unit tower.

Why committees don't decide

The scene repeats itself. The architect, the engineer, the site manager, procurement and the commercial lead are all there. Plans on the table. Each of them looks at the same sheet and sees something different.

Nobody actually disagrees — it's that nobody is looking at the same thing. So the decision gets pushed “pending review,” another render gets requested, another meeting gets scheduled. Two weeks later the topic comes back unchanged.

Autodesk and FMI surveyed more than 3,900 industry professionals and put a price on it. Bad data — incomplete, inaccessible, inconsistent or late — cost global construction roughly US$1.85 trillion in 2020. In rework alone, US$88.69 billion: 14% of all rework performed that year.

And most of it starts in design

The Construction Industry Institute analyzed nine industrial projects and found that deviations ending in rework, repair or replacement accounted for 12.4% of total installed project cost.

Here's the revealing part: design changes, errors and omissions explained 78% of the number of deviations and 79% of their cost — equal to 9.5% of total project cost. It isn't that the site crew gets it wrong. It's that they arrive to build something that was never fully defined.

What a month of indecision costs

The cost of time never shows up in the minutes, but it gets paid:

• Financial. One more month of construction financing, trust fees and fixed project overhead.
• Commercial. A launch window that slides and lands in low season.
• Operational. Contractors and suppliers waiting, with quotes expiring and prices to renegotiate.
• Team. Skilled people spending hours re-explaining the same thing.

What changes with a model everyone can see

When the project is modeled in 3D and projected in the meeting, the conversation changes in kind. Nobody has to imagine anymore: you navigate to the point in question, look, and decide.

Dodge Data & Analytics found that 87% of BIM users report positive value, and the benefits they cite most are exactly those: fewer errors, less rework and greater cost predictability.

The model doesn't make the decision. It just removes the excuse to postpone it.

With Vista D360 we do precisely that: we turn plans, mockups and renders into a navigable model and review it in sessions with the leads from each area. What gets decided is recorded in minutes and on video, with traceability of what changed and why.

Sources

McKinsey — Imagining construction’s digital future · Autodesk + FMI — Harnessing the Data Advantage in Construction · Construction Industry Institute — Costs of Quality Deviations