Construction & Architecture

The same number differs from document to document

Whether the gross floor area in the design summary matches the total in the area schedule, whether the excavation level in the calculation sheet matches the elevation on the section — every revision is checked line by line with eyes and a calculator. One summation error in one table becomes a permitting and contract risk.

Summation, ratios and verdicts are performed only by deterministic decimal code, and the LLM is forbidden to do arithmetic. Results pass an independent check that is blind to the first conclusion and are issued in exactly four states (VERIFIED / MISMATCH / NEEDS_REVIEW / NOT_APPLICABLE), with every value traceable back to page, cell and coordinate. Click a number and the matching location in the drawing opens.

A drawing is only a drawing to the human eye

Pulling a single valve list out of hundreds of P&ID sheets still means retyping into a spreadsheet, and nobody can guarantee that what was typed matches the drawing. In many drawings the text has been frozen into curves — it cannot even be copied.

Deterministic first — we read the geometry and text of the vector PDF directly and decode tag grammar, symbol vocabulary and annotation conventions as explicit rules. AI is brought in only as a fallback on the last stretch determinism cannot reach, and every value carries its source coordinates and a confidence level so a person can check and approve it on the drawing itself. A verdict we are not confident in is never passed silently.