AI Plan Comparison
AI that shows what changed between two versions of a drawing set.
Quick Answer
AI plan comparison is the use of software to compare two versions of a drawing set and identify what changed. It aligns matching sheets, detects added, removed or modified content, and groups the differences by sheet and discipline. Reviewers then focus on real revisions instead of overlaying or flipping through every sheet manually.
The Full Picture
Drawing sets change constantly between design milestones, addenda and bulletins. Each new issue can touch hundreds of sheets, and the cloud-and-delta marks that designers add are not always complete. Missing a change can mean pricing the wrong scope or ordering the wrong material.
AI plan comparison works at the set level. It first matches sheets between the two versions, usually by sheet number and title, and handles renumbered, added or deleted sheets. It then compares content on matched sheets, using visual differences, extracted text and sometimes detected elements, to produce a list of changes tied to locations on the sheets.
Because it compares the content itself rather than relying on revision clouds, it can surface changes that were never marked. It can also filter noise, such as a shifted title block or a re-exported file with slightly different rendering, though no tool removes false positives entirely.
The output is a triage list, not a verdict. A person still decides which changes affect cost, schedule or coordination. The value is speed and coverage: a full set can be screened in minutes, and attention goes to the sheets that actually changed.
Real Examples
Common Misconceptions
People assume: Revision clouds already tell you everything that changed.
Actually: Clouds depend on the designer remembering to mark each change. Content-based comparison can catch changes that were not clouded.
People assume: AI comparison replaces reviewing the changes.
Actually: It finds and organizes differences. Judging their cost and coordination impact still takes an experienced person.
Does MeltPlan Solve This?
Yes — direct fitMeltPlan's Design Review compares drawing revisions and flags the changes between them, alongside missing requirements and inconsistencies in the set. Upload both versions and the AI surfaces what needs your team's attention.
Find changes between drawing revisions →Frequently Asked Questions
What is AI plan comparison?
It is software that compares two versions of a drawing set and lists what was added, removed or changed, tied to specific sheets and locations.
How is it different from overlaying PDFs?
Overlays show raw visual differences and need manual interpretation. AI comparison matches sheets, filters some noise and groups changes so reviewers can triage them faster.
Can it detect changes that were not clouded?
Yes, because it compares the content of the sheets, not just the designer's markings. Results should still be verified before pricing or ordering.
Does it work across disciplines?
It can compare any discipline's sheets, but understanding how a change in one discipline affects another still requires human coordination.
What file types does it need?
Most tools work with PDF sets. Vector PDFs generally give cleaner results than scans.