Compare Versions
Takes two versions of the same drawing set and tells you exactly what changed between them, sheet by sheet. It surfaces specific MEP, architectural, and civil change. Each finding is tagged with discipline, severity, and confidence, with a box drawn around the exact spot on the page so reviewers can click straight to it. This tool is especially valuable for multi-discipline coordination and prototype or chain projects where the same set iterates many times.
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Compare Versions Overview
Compare Versions is an AI-powered drawing revision review tool built for architecture, engineering, and construction teams who need to know exactly what changed between two versions of a project — quickly, accurately, and without manual page-by-page cross-checking. Whether you're moving from a 30% to a 65% submittal, reviewing a permit revision against the original construction documents, or auditing a prototype drawing set against a new location, Compare Versions produces a complete, structured record of every change across the set in minutes rather than days.
The tool ingests two PDF versions of the same drawing set and begins by intelligently pairing matching sheets across both documents. Sheet pairing is resilient to renumbering, reordering, and discipline reorganization, so an A-101 that became A1.01 in the new set still gets recognized as the same drawing. Sheets that exist in only one version are flagged as added or removed, while paired sheets are scanned for substantive content changes.
For each matched sheet pair, Compare Versions uses multi-pass ensemble verification to detect added, removed, and modified content across all major disciplines — mechanical, electrical, plumbing, fire protection, architectural, structural, and civil. Findings include changes to equipment tags, fixture counts, schedules, spec sections, code references, dimensions, notes, room programs, and drawing index entries. Every finding is tagged with its discipline, change category, severity (high, medium, low), and a confidence score, and is anchored to its exact location on the page with a precise bounding box so reviewers can click straight from the report to the change itself.
Results can be viewed by sheet pair, grouped by room and building level, filtered by discipline or severity, or summarized in a per-discipline breakdown that shows how many sheets were modified, unchanged, added, or removed in each trade. An executive summary is generated automatically, and the full revision log can be exported for transmittals, coordination meetings, owner reports, or QA/QC documentation.
Compare Versions is especially valuable for MEP coordination, multi-discipline submittal review, fast-moving renovation projects, and chain or prototype rollouts where the same drawing set iterates through many milestones — giving design teams, project managers, and reviewers a fast, auditable answer to the question "what actually changed?"
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