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Small drawing errors, big impact: change orders and delays

A single small discrepancy between the architectural and engineering drawings, or between the specifications and the details, can stop construction for weeks or trigger a multimillion-dollar change order. Catching these on paper before permit or before construction is one of the highest-ROI uses of AI plan checking.

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Real impact of "small" errors

Architectural vs. engineering inconsistency

When the architect's plan and the structural detail don't match, the contractor follows one and the other fails, or work stops until an RFI is answered. In real projects, a single such inconsistency has led to construction stuck for a month while the team resolved who was correct.

Specification vs. drawing, one line

One small difference between the specification and the drawing (a material, a size, or a detail) can become a change order. On a large project, we've heard from customers: one such discrepancy led to a $3 million change order. The "small" detail on the drawing wasn't small when it hit the field and the budget.

Senior reviewers often focus on the big picture: overall structural design, major coordination, code intent. It's hard to catch every tiny mismatch across hundreds of sheets. Contractors and developers have told us that these small details, small on the page, are exactly what blow up in cost and schedule. AI plan checking is built to find them before they do.

What early plan check catches

  • Spec vs. drawing conflicts

    Material calls, sizes, and callouts that don't match between the spec book and the drawings. Fix them in design instead of discovering them in the field.

  • Cross-discipline mismatches

    Architectural and structural (or MEP) details that disagree. The AI compares related sheets and flags inconsistencies so you resolve them before submission or construction.

  • Fewer RFIs and revisions

    When you fix issues before permit or bid, you get fewer plan check comments, fewer RFIs in construction, and less rework and delay. Same-day or same-week results so you can iterate quickly.

  • Evidence for every finding

    Every issue includes page references and evidence. You can verify in seconds and route fixes to the right person. Export to spreadsheet or one-click RFI PDF for the design team.

When to run a check

  • Before permit submittal: Catch code and coordination issues so you get fewer city comments and faster approval.
  • Before sending to client: Ensure comment/checklist compliance and internal QA so the set you issue is consistent.
  • Before bid or construction: Give contractors and subs a cleaner set; reduce RFIs and change orders once work starts.

Related resources

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