TREN

Engineering · Repetitive industrial workflows

AI System for Comparing Technical Drawings with BOM Records

Keeping an optional part outside the main bill of materials means that not every discrepancy is an error. AI compares the drawing and bill-of-materials revisions and prepares a discrepancy list. The product engineer decides which revision is current.

Representative product engineering panel with a work queue, checks and an audit trail: technical drawing and bom variance queue — **Technical drawing and BOM variance queue** Representative interface — contains no real data. Product codes are representative. The current revision is not selected and the BOM is not changed on this screen.

The problem

When the technical drawing, bill of materials and revision record are held in different sources, fields have to be matched by hand before a draft revision discrepancy list can be prepared.

The product engineer must compare every suggestion in the revision discrepancy list with its source record; missing or conflicting evidence must not take the place of a final decision.

If an optional part kept outside the main bill of materials is not separated for review, an incorrect parts list may be released to production; the record must not progress without a human decision.

What we set out to improve

Time for the draft revision discrepancy list to reach the product engineer with its supporting evidence
Outcomes of records separated for human review because an optional part is kept outside the main bill of materials
Number of suggestions corrected after identifying the risk that an incorrect parts list could be released to production

How the system works

01 Receive the technical drawing, bill of materials and revision record from permitted sources with the record identity
02 Link the source, date and version details to a common work record
03 Validate fields and units
04 Prepare the revision discrepancy list with its supporting evidence
05 Check the exception: an optional part may be kept outside the main bill of materials
06 Have the product engineer accept, correct or reject the suggestion
07 Write the approved decision and its source to the activity log

Methods we used

A common, source-identified data schema for the technical drawing, bill of materials and revision record
A decision structure that separates deterministic rules from AI suggestions
A review screen showing the revision discrepancy list beside the raw evidence
A mandatory human review queue when an optional part is kept outside the main bill of materials
An event identity that prevents duplicate processing

Where people stay involved

The product engineer compares the revision discrepancy list with the supporting record. Progress stops when an optional part may have been kept outside the main bill of materials. The responsible person can change or reject the suggestion, or request further information.

Data and security

Technical drawings, bills of materials and revision records should be processed using only the fields required for this decision. Access to the source should be authorised separately from the product engineer role; personal data, commercial information and technical secrets should not be passed into the model context unless needed. Reading, suggestions and human decisions should be logged separately.

Who this suits

A good fit

Teams that regularly prepare revision discrepancy lists
Organisations that combine technical drawings, bills of materials and revision records by hand
Companies that want exception decisions to remain with people

Not a good fit

Teams whose source data is not current and consistent
Teams where responsibility for product engineering has not been defined
Teams that would apply AI suggestions without review

Frequently asked questions

What data does the system use?

Technical drawings, bills of materials and revision records can be received through an API or controlled file transfer. Fields whose source and version cannot be established are not treated as definitive information.

When does the process stop?

The record goes to the product engineer when this exception occurs: an optional part is kept outside the main bill of materials. No action is taken in the target system if supporting evidence is missing.

Does AI apply the decision on its own?

No. The revision discrepancy list remains a draft until the product engineer approves it. Acceptance, correction and rejection are written to the activity log as human decisions.

Project led by:DijitalPi

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