Compare ASSY to BOM

Do your PCB assembly drawings match your BOMs? Compare ASSY to BOM reads your BOM files and your final assembly-drawing PDF, then verifies that everything in the BOM is on the drawing — and that everything on the drawing is accounted for in the BOM. This eliminates slow, error-prone manual verification and saves the costly, time-consuming churn of working out issues with your assembly shop after the fact.

You give the tool two things: a BOM file — a text export listing every reference designator or item that belongs on the assembly — and the assembly drawing as a text-searchable PDF. The tool opens the PDF, reads the callouts printed on each sheet, builds its own parts list from what it actually finds, and compares that list against the BOM. Every disagreement is reported item by item, and clicking one zooms the drawing straight to that spot so you can confirm the problem with your own eyes.

Work is split across two tabs, so each class of part is checked the right way:

• PCB tab — the electronic components: resistors, capacitors, connectors, ICs, and everything else placed by the SMT and assembly processes.
• Mech tab — the mechanical hardware installed on the same assembly: screws, standoffs, brackets, labels, and other non-electronic parts.

On the PCB tab, the BOM is separated into the parts that should be present (surface-mount and assembly components) and the parts that should be absent (anything flagged Not Installed). From there the tool does the tedious cross-checking for you:

• Automatic quantity comparison flags every item whose drawing count doesn’t match the BOM — parts drawn twice, parts missing entirely, and anything drawn that the BOM doesn’t account for.
• Three one-click verifications run explicit presence checks and write a plain-language pass/fail summary: Verify ASSY confirms every assembly part appears on the drawing, Verify SMT confirms every surface-mount designator appears, and Verify CNI confirms every not-installed part is correctly absent.
• Click-to-zoom review lists every place an item was found on the drawing; clicking any instance jumps Acrobat to that exact location so you can tell a genuine callout from a duplicate or a false read — and clear it or flag it for correction.

You can save your progress and pick the review back up later, so a large drawing doesn’t have to be finished in one sitting.

Every mouse click costs you money. Compare ASSY to BOM turns an hours-long, eyes-on manual check — the kind that quietly lets a missing part or a wrong quantity slip through to the assembly shop — into a fast, repeatable pass that points you straight at the handful of things that actually need attention.