A drawing revision hides its changes.

DARS reads two issues of the same construction drawing and reports the delta: what went, what arrived, and what each change is worth.

01Align, then compare

A bigger title block shifts the whole page. That is not a change.

02Every finding has a place

A rectangle on the sheet, in paper millimetres.

03Graded, with the reason

Red, amber or green, a category, and why.