Machine Design #89: Part Marking — Identify It Without Weakening the Product
MINATA turns the Vietnamese source into an evidence-led guide. part marking must remain clear, manufacturable, searchable, inspectable, and maintainable when the boundary changes.
Function before naming
Write the function, input, expected result, failure symptom, acceptance limit, and measurement method before selecting a name, mark, material, or note. Assign an owner to every value.
Core checks
- Identification need and location: record value, source, method, owner, and pass/fail evidence.
- Method, depth, width, and stress risk: record value, source, method, owner, and pass/fail evidence.
- Material, heat treatment, and corrosion impact: record value, source, method, owner, and pass/fail evidence.
- Readable code after coating or cleaning: record value, source, method, owner, and pass/fail evidence.
- Inspection, verification, and data link: record value, source, method, owner, and pass/fail evidence.
- Repair, replacement, and record retention: record value, source, method, owner, and pass/fail evidence.
| Failure mode | Symptom | Verification |
|---|
| Ambiguous identity | Wrong part or record | Search and audit a real lot |
| Omitted interface | Purchase, assembly, or service error | Walk the real route |
| Documents out of sync | Correct name, wrong revision | Baseline every reference |
1. Review pass: function and ownership
Review function and ownership for the part marking. The key risk is mark depth, stress concentration, corrosion, readability, and genealogy. Define lower and upper boundaries, the simultaneous worst case, evidence source, owner, and change trigger. Confirm drawing, BOM, purchasing, supplier certificate, inspection, database, label, and work instruction use the same revision. Test normal use, replacement, interruption, wrong input, and a controlled fault. Record actual value, unit, condition, instrument or log, sample or serial, pass/fail, and next action.
2. Review pass: identity and interfaces
Review identity and interfaces for the part marking. The key risk is mark depth, stress concentration, corrosion, readability, and genealogy. Define lower and upper boundaries, the simultaneous worst case, evidence source, owner, and change trigger. Confirm drawing, BOM, purchasing, supplier certificate, inspection, database, label, and work instruction use the same revision. Test normal use, replacement, interruption, wrong input, and a controlled fault. Record actual value, unit, condition, instrument or log, sample or serial, pass/fail, and next action.
3. Review pass: supplier and process
Review supplier and process for the part marking. The key risk is mark depth, stress concentration, corrosion, readability, and genealogy. Define lower and upper boundaries, the simultaneous worst case, evidence source, owner, and change trigger. Confirm drawing, BOM, purchasing, supplier certificate, inspection, database, label, and work instruction use the same revision. Test normal use, replacement, interruption, wrong input, and a controlled fault. Record actual value, unit, condition, instrument or log, sample or serial, pass/fail, and next action.
4. Review pass: inspection and evidence
Review inspection and evidence for the part marking. The key risk is mark depth, stress concentration, corrosion, readability, and genealogy. Define lower and upper boundaries, the simultaneous worst case, evidence source, owner, and change trigger. Confirm drawing, BOM, purchasing, supplier certificate, inspection, database, label, and work instruction use the same revision. Test normal use, replacement, interruption, wrong input, and a controlled fault. Record actual value, unit, condition, instrument or log, sample or serial, pass/fail, and next action.
5. Review pass: purchasing and replacement
Review purchasing and replacement for the part marking. The key risk is mark depth, stress concentration, corrosion, readability, and genealogy. Define lower and upper boundaries, the simultaneous worst case, evidence source, owner, and change trigger. Confirm drawing, BOM, purchasing, supplier certificate, inspection, database, label, and work instruction use the same revision. Test normal use, replacement, interruption, wrong input, and a controlled fault. Record actual value, unit, condition, instrument or log, sample or serial, pass/fail, and next action.
6. Review pass: maintenance and recovery
Review maintenance and recovery for the part marking. The key risk is mark depth, stress concentration, corrosion, readability, and genealogy. Define lower and upper boundaries, the simultaneous worst case, evidence source, owner, and change trigger. Confirm drawing, BOM, purchasing, supplier certificate, inspection, database, label, and work instruction use the same revision. Test normal use, replacement, interruption, wrong input, and a controlled fault. Record actual value, unit, condition, instrument or log, sample or serial, pass/fail, and next action.
7. Review pass: revision and change
Review revision and change for the part marking. The key risk is mark depth, stress concentration, corrosion, readability, and genealogy. Define lower and upper boundaries, the simultaneous worst case, evidence source, owner, and change trigger. Confirm drawing, BOM, purchasing, supplier certificate, inspection, database, label, and work instruction use the same revision. Test normal use, replacement, interruption, wrong input, and a controlled fault. Record actual value, unit, condition, instrument or log, sample or serial, pass/fail, and next action.
8. Review pass: training and handover
Review training and handover for the part marking. The key risk is mark depth, stress concentration, corrosion, readability, and genealogy. Define lower and upper boundaries, the simultaneous worst case, evidence source, owner, and change trigger. Confirm drawing, BOM, purchasing, supplier certificate, inspection, database, label, and work instruction use the same revision. Test normal use, replacement, interruption, wrong input, and a controlled fault. Record actual value, unit, condition, instrument or log, sample or serial, pass/fail, and next action.
9. Review pass: safety and misuse
Review safety and misuse for the part marking. The key risk is mark depth, stress concentration, corrosion, readability, and genealogy. Define lower and upper boundaries, the simultaneous worst case, evidence source, owner, and change trigger. Confirm drawing, BOM, purchasing, supplier certificate, inspection, database, label, and work instruction use the same revision. Test normal use, replacement, interruption, wrong input, and a controlled fault. Record actual value, unit, condition, instrument or log, sample or serial, pass/fail, and next action.
10. Review pass: data and audit
Review data and audit for the part marking. The key risk is mark depth, stress concentration, corrosion, readability, and genealogy. Define lower and upper boundaries, the simultaneous worst case, evidence source, owner, and change trigger. Confirm drawing, BOM, purchasing, supplier certificate, inspection, database, label, and work instruction use the same revision. Test normal use, replacement, interruption, wrong input, and a controlled fault. Record actual value, unit, condition, instrument or log, sample or serial, pass/fail, and next action.
11. Review pass: field feedback
Review field feedback for the part marking. The key risk is mark depth, stress concentration, corrosion, readability, and genealogy. Define lower and upper boundaries, the simultaneous worst case, evidence source, owner, and change trigger. Confirm drawing, BOM, purchasing, supplier certificate, inspection, database, label, and work instruction use the same revision. Test normal use, replacement, interruption, wrong input, and a controlled fault. Record actual value, unit, condition, instrument or log, sample or serial, pass/fail, and next action.
12. Review pass: acceptance
Review acceptance for the part marking. The key risk is mark depth, stress concentration, corrosion, readability, and genealogy. Define lower and upper boundaries, the simultaneous worst case, evidence source, owner, and change trigger. Confirm drawing, BOM, purchasing, supplier certificate, inspection, database, label, and work instruction use the same revision. Test normal use, replacement, interruption, wrong input, and a controlled fault. Record actual value, unit, condition, instrument or log, sample or serial, pass/fail, and next action.
13. Review pass: lifecycle
Review lifecycle for the part marking. The key risk is mark depth, stress concentration, corrosion, readability, and genealogy. Define lower and upper boundaries, the simultaneous worst case, evidence source, owner, and change trigger. Confirm drawing, BOM, purchasing, supplier certificate, inspection, database, label, and work instruction use the same revision. Test normal use, replacement, interruption, wrong input, and a controlled fault. Record actual value, unit, condition, instrument or log, sample or serial, pass/fail, and next action.
14. Review pass: final release
Review final release for the part marking. The key risk is mark depth, stress concentration, corrosion, readability, and genealogy. Define lower and upper boundaries, the simultaneous worst case, evidence source, owner, and change trigger. Confirm drawing, BOM, purchasing, supplier certificate, inspection, database, label, and work instruction use the same revision. Test normal use, replacement, interruption, wrong input, and a controlled fault. Record actual value, unit, condition, instrument or log, sample or serial, pass/fail, and next action.
15. Review pass: function and ownership
Review function and ownership for the part marking. The key risk is mark depth, stress concentration, corrosion, readability, and genealogy. Define lower and upper boundaries, the simultaneous worst case, evidence source, owner, and change trigger. Confirm drawing, BOM, purchasing, supplier certificate, inspection, database, label, and work instruction use the same revision. Test normal use, replacement, interruption, wrong input, and a controlled fault. Record actual value, unit, condition, instrument or log, sample or serial, pass/fail, and next action.
16. Review pass: identity and interfaces
Review identity and interfaces for the part marking. The key risk is mark depth, stress concentration, corrosion, readability, and genealogy. Define lower and upper boundaries, the simultaneous worst case, evidence source, owner, and change trigger. Confirm drawing, BOM, purchasing, supplier certificate, inspection, database, label, and work instruction use the same revision. Test normal use, replacement, interruption, wrong input, and a controlled fault. Record actual value, unit, condition, instrument or log, sample or serial, pass/fail, and next action.
17. Review pass: supplier and process
Review supplier and process for the part marking. The key risk is mark depth, stress concentration, corrosion, readability, and genealogy. Define lower and upper boundaries, the simultaneous worst case, evidence source, owner, and change trigger. Confirm drawing, BOM, purchasing, supplier certificate, inspection, database, label, and work instruction use the same revision. Test normal use, replacement, interruption, wrong input, and a controlled fault. Record actual value, unit, condition, instrument or log, sample or serial, pass/fail, and next action.
18. Review pass: inspection and evidence
Review inspection and evidence for the part marking. The key risk is mark depth, stress concentration, corrosion, readability, and genealogy. Define lower and upper boundaries, the simultaneous worst case, evidence source, owner, and change trigger. Confirm drawing, BOM, purchasing, supplier certificate, inspection, database, label, and work instruction use the same revision. Test normal use, replacement, interruption, wrong input, and a controlled fault. Record actual value, unit, condition, instrument or log, sample or serial, pass/fail, and next action.
19. Review pass: purchasing and replacement
Review purchasing and replacement for the part marking. The key risk is mark depth, stress concentration, corrosion, readability, and genealogy. Define lower and upper boundaries, the simultaneous worst case, evidence source, owner, and change trigger. Confirm drawing, BOM, purchasing, supplier certificate, inspection, database, label, and work instruction use the same revision. Test normal use, replacement, interruption, wrong input, and a controlled fault. Record actual value, unit, condition, instrument or log, sample or serial, pass/fail, and next action.
20. Review pass: maintenance and recovery
Review maintenance and recovery for the part marking. The key risk is mark depth, stress concentration, corrosion, readability, and genealogy. Define lower and upper boundaries, the simultaneous worst case, evidence source, owner, and change trigger. Confirm drawing, BOM, purchasing, supplier certificate, inspection, database, label, and work instruction use the same revision. Test normal use, replacement, interruption, wrong input, and a controlled fault. Record actual value, unit, condition, instrument or log, sample or serial, pass/fail, and next action.
21. Review pass: revision and change
Review revision and change for the part marking. The key risk is mark depth, stress concentration, corrosion, readability, and genealogy. Define lower and upper boundaries, the simultaneous worst case, evidence source, owner, and change trigger. Confirm drawing, BOM, purchasing, supplier certificate, inspection, database, label, and work instruction use the same revision. Test normal use, replacement, interruption, wrong input, and a controlled fault. Record actual value, unit, condition, instrument or log, sample or serial, pass/fail, and next action.
22. Review pass: training and handover
Review training and handover for the part marking. The key risk is mark depth, stress concentration, corrosion, readability, and genealogy. Define lower and upper boundaries, the simultaneous worst case, evidence source, owner, and change trigger. Confirm drawing, BOM, purchasing, supplier certificate, inspection, database, label, and work instruction use the same revision. Test normal use, replacement, interruption, wrong input, and a controlled fault. Record actual value, unit, condition, instrument or log, sample or serial, pass/fail, and next action.
23. Review pass: safety and misuse
Review safety and misuse for the part marking. The key risk is mark depth, stress concentration, corrosion, readability, and genealogy. Define lower and upper boundaries, the simultaneous worst case, evidence source, owner, and change trigger. Confirm drawing, BOM, purchasing, supplier certificate, inspection, database, label, and work instruction use the same revision. Test normal use, replacement, interruption, wrong input, and a controlled fault. Record actual value, unit, condition, instrument or log, sample or serial, pass/fail, and next action.
24. Review pass: data and audit
Review data and audit for the part marking. The key risk is mark depth, stress concentration, corrosion, readability, and genealogy. Define lower and upper boundaries, the simultaneous worst case, evidence source, owner, and change trigger. Confirm drawing, BOM, purchasing, supplier certificate, inspection, database, label, and work instruction use the same revision. Test normal use, replacement, interruption, wrong input, and a controlled fault. Record actual value, unit, condition, instrument or log, sample or serial, pass/fail, and next action.
25. Review pass: field feedback
Review field feedback for the part marking. The key risk is mark depth, stress concentration, corrosion, readability, and genealogy. Define lower and upper boundaries, the simultaneous worst case, evidence source, owner, and change trigger. Confirm drawing, BOM, purchasing, supplier certificate, inspection, database, label, and work instruction use the same revision. Test normal use, replacement, interruption, wrong input, and a controlled fault. Record actual value, unit, condition, instrument or log, sample or serial, pass/fail, and next action.
26. Review pass: acceptance
Review acceptance for the part marking. The key risk is mark depth, stress concentration, corrosion, readability, and genealogy. Define lower and upper boundaries, the simultaneous worst case, evidence source, owner, and change trigger. Confirm drawing, BOM, purchasing, supplier certificate, inspection, database, label, and work instruction use the same revision. Test normal use, replacement, interruption, wrong input, and a controlled fault. Record actual value, unit, condition, instrument or log, sample or serial, pass/fail, and next action.
27. Review pass: lifecycle
Review lifecycle for the part marking. The key risk is mark depth, stress concentration, corrosion, readability, and genealogy. Define lower and upper boundaries, the simultaneous worst case, evidence source, owner, and change trigger. Confirm drawing, BOM, purchasing, supplier certificate, inspection, database, label, and work instruction use the same revision. Test normal use, replacement, interruption, wrong input, and a controlled fault. Record actual value, unit, condition, instrument or log, sample or serial, pass/fail, and next action.
28. Review pass: final release
Review final release for the part marking. The key risk is mark depth, stress concentration, corrosion, readability, and genealogy. Define lower and upper boundaries, the simultaneous worst case, evidence source, owner, and change trigger. Confirm drawing, BOM, purchasing, supplier certificate, inspection, database, label, and work instruction use the same revision. Test normal use, replacement, interruption, wrong input, and a controlled fault. Record actual value, unit, condition, instrument or log, sample or serial, pass/fail, and next action.
MINATA release checklist
- [ ] Function, identity, boundary, and failure symptom are written.
- [ ] Ownership, interface, and mistake-proofing are clear.
- [ ] Six topic checks have evidence and pass/fail limits.
- [ ] Manufacturing, purchasing, inspection, and maintenance were tried.
- [ ] Revision, supplier, database, and lifecycle records agree.
Good engineering is an explicit chain that survives manufacture, operation, maintenance, and change. For part marking, evidence that identification and function remain reliable is the MINATA standard.
Public references
- MINATA Q-up design practice and internal review checklist.
- Applicable drawing, material, quality, or lifecycle standard selected by the project owner.
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