Machine Design #80: Supplementary Dimension Symbols — One Wrong Symbol Can Change the Process
MINATA translates the Vietnamese source into an evidence-led guide. The supplementary dimension symbol must be readable, manufacturable, inspectable, maintainable, and safe when the boundary changes.
Start with the function
Write the input condition, expected result, acceptance limit, failure symptom, and measurement method before choosing a view, symbol, feature, or note. Do not hide unknowns behind a large factor; assign an owner and a test.
Core checks
- Function of the symbol and affected process: record assumption, value, source, method, and pass/fail evidence.
- Reference edge, datum, and measurement direction: record assumption, value, source, method, and pass/fail evidence.
- Machining, forming, welding, or inspection meaning: record assumption, value, source, method, and pass/fail evidence.
- Supplier interpretation and confirmation: record assumption, value, source, method, and pass/fail evidence.
- Consistency with standards and model: record assumption, value, source, method, and pass/fail evidence.
- Review evidence before release: record assumption, value, source, method, and pass/fail evidence.
Failure modes
| Failure mode | Symptom | Verification |
|---|
| Ambiguous meaning | Wrong process or inspection | Review standard and evidence |
| Omitted interface | Assembly or maintenance error | Walk the real route |
| Documents out of sync | Correct name, wrong revision | Baseline all references |
1. Review pass: function and manufacturing intent
Review function and manufacturing intent for the supplementary dimension symbol at the real machine. The key risk is symbol meaning, process intent, inspection, and revision clarity. State lower and upper boundaries, the simultaneous worst combination, the evidence source, and the owner. Confirm that model, drawing, BOM, process, inspection, and work instruction use the same revision. Test normal operation, stop, restart, interruption, and a controlled fault. Record value, unit, condition, instrument or log, sample or serial, pass/fail, and next action.
2. Review pass: datums and interfaces
Review datums and interfaces for the supplementary dimension symbol at the real machine. The key risk is symbol meaning, process intent, inspection, and revision clarity. State lower and upper boundaries, the simultaneous worst combination, the evidence source, and the owner. Confirm that model, drawing, BOM, process, inspection, and work instruction use the same revision. Test normal operation, stop, restart, interruption, and a controlled fault. Record value, unit, condition, instrument or log, sample or serial, pass/fail, and next action.
3. Review pass: process and supplier capability
Review process and supplier capability for the supplementary dimension symbol at the real machine. The key risk is symbol meaning, process intent, inspection, and revision clarity. State lower and upper boundaries, the simultaneous worst combination, the evidence source, and the owner. Confirm that model, drawing, BOM, process, inspection, and work instruction use the same revision. Test normal operation, stop, restart, interruption, and a controlled fault. Record 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 supplementary dimension symbol at the real machine. The key risk is symbol meaning, process intent, inspection, and revision clarity. State lower and upper boundaries, the simultaneous worst combination, the evidence source, and the owner. Confirm that model, drawing, BOM, process, inspection, and work instruction use the same revision. Test normal operation, stop, restart, interruption, and a controlled fault. Record value, unit, condition, instrument or log, sample or serial, pass/fail, and next action.
5. Review pass: assembly and maintenance
Review assembly and maintenance for the supplementary dimension symbol at the real machine. The key risk is symbol meaning, process intent, inspection, and revision clarity. State lower and upper boundaries, the simultaneous worst combination, the evidence source, and the owner. Confirm that model, drawing, BOM, process, inspection, and work instruction use the same revision. Test normal operation, stop, restart, interruption, and a controlled fault. Record value, unit, condition, instrument or log, sample or serial, pass/fail, and next action.
6. Review pass: failure and recovery
Review failure and recovery for the supplementary dimension symbol at the real machine. The key risk is symbol meaning, process intent, inspection, and revision clarity. State lower and upper boundaries, the simultaneous worst combination, the evidence source, and the owner. Confirm that model, drawing, BOM, process, inspection, and work instruction use the same revision. Test normal operation, stop, restart, interruption, and a controlled fault. Record 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 supplementary dimension symbol at the real machine. The key risk is symbol meaning, process intent, inspection, and revision clarity. State lower and upper boundaries, the simultaneous worst combination, the evidence source, and the owner. Confirm that model, drawing, BOM, process, inspection, and work instruction use the same revision. Test normal operation, stop, restart, interruption, and a controlled fault. Record 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 supplementary dimension symbol at the real machine. The key risk is symbol meaning, process intent, inspection, and revision clarity. State lower and upper boundaries, the simultaneous worst combination, the evidence source, and the owner. Confirm that model, drawing, BOM, process, inspection, and work instruction use the same revision. Test normal operation, stop, restart, interruption, and a controlled fault. Record value, unit, condition, instrument or log, sample or serial, pass/fail, and next action.
9. Review pass: field feedback
Review field feedback for the supplementary dimension symbol at the real machine. The key risk is symbol meaning, process intent, inspection, and revision clarity. State lower and upper boundaries, the simultaneous worst combination, the evidence source, and the owner. Confirm that model, drawing, BOM, process, inspection, and work instruction use the same revision. Test normal operation, stop, restart, interruption, and a controlled fault. Record value, unit, condition, instrument or log, sample or serial, pass/fail, and next action.
10. Review pass: safety and misuse
Review safety and misuse for the supplementary dimension symbol at the real machine. The key risk is symbol meaning, process intent, inspection, and revision clarity. State lower and upper boundaries, the simultaneous worst combination, the evidence source, and the owner. Confirm that model, drawing, BOM, process, inspection, and work instruction use the same revision. Test normal operation, stop, restart, interruption, and a controlled fault. Record value, unit, condition, instrument or log, sample or serial, pass/fail, and next action.
11. Review pass: configuration and BOM
Review configuration and BOM for the supplementary dimension symbol at the real machine. The key risk is symbol meaning, process intent, inspection, and revision clarity. State lower and upper boundaries, the simultaneous worst combination, the evidence source, and the owner. Confirm that model, drawing, BOM, process, inspection, and work instruction use the same revision. Test normal operation, stop, restart, interruption, and a controlled fault. Record value, unit, condition, instrument or log, sample or serial, pass/fail, and next action.
12. Review pass: measurement and audit
Review measurement and audit for the supplementary dimension symbol at the real machine. The key risk is symbol meaning, process intent, inspection, and revision clarity. State lower and upper boundaries, the simultaneous worst combination, the evidence source, and the owner. Confirm that model, drawing, BOM, process, inspection, and work instruction use the same revision. Test normal operation, stop, restart, interruption, and a controlled fault. Record value, unit, condition, instrument or log, sample or serial, pass/fail, and next action.
13. Review pass: prototype and acceptance
Review prototype and acceptance for the supplementary dimension symbol at the real machine. The key risk is symbol meaning, process intent, inspection, and revision clarity. State lower and upper boundaries, the simultaneous worst combination, the evidence source, and the owner. Confirm that model, drawing, BOM, process, inspection, and work instruction use the same revision. Test normal operation, stop, restart, interruption, and a controlled fault. Record value, unit, condition, instrument or log, sample or serial, pass/fail, and next action.
14. Review pass: final release
Review final release for the supplementary dimension symbol at the real machine. The key risk is symbol meaning, process intent, inspection, and revision clarity. State lower and upper boundaries, the simultaneous worst combination, the evidence source, and the owner. Confirm that model, drawing, BOM, process, inspection, and work instruction use the same revision. Test normal operation, stop, restart, interruption, and a controlled fault. Record value, unit, condition, instrument or log, sample or serial, pass/fail, and next action.
15. Review pass: function and manufacturing intent
Review function and manufacturing intent for the supplementary dimension symbol at the real machine. The key risk is symbol meaning, process intent, inspection, and revision clarity. State lower and upper boundaries, the simultaneous worst combination, the evidence source, and the owner. Confirm that model, drawing, BOM, process, inspection, and work instruction use the same revision. Test normal operation, stop, restart, interruption, and a controlled fault. Record value, unit, condition, instrument or log, sample or serial, pass/fail, and next action.
16. Review pass: datums and interfaces
Review datums and interfaces for the supplementary dimension symbol at the real machine. The key risk is symbol meaning, process intent, inspection, and revision clarity. State lower and upper boundaries, the simultaneous worst combination, the evidence source, and the owner. Confirm that model, drawing, BOM, process, inspection, and work instruction use the same revision. Test normal operation, stop, restart, interruption, and a controlled fault. Record value, unit, condition, instrument or log, sample or serial, pass/fail, and next action.
17. Review pass: process and supplier capability
Review process and supplier capability for the supplementary dimension symbol at the real machine. The key risk is symbol meaning, process intent, inspection, and revision clarity. State lower and upper boundaries, the simultaneous worst combination, the evidence source, and the owner. Confirm that model, drawing, BOM, process, inspection, and work instruction use the same revision. Test normal operation, stop, restart, interruption, and a controlled fault. Record 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 supplementary dimension symbol at the real machine. The key risk is symbol meaning, process intent, inspection, and revision clarity. State lower and upper boundaries, the simultaneous worst combination, the evidence source, and the owner. Confirm that model, drawing, BOM, process, inspection, and work instruction use the same revision. Test normal operation, stop, restart, interruption, and a controlled fault. Record value, unit, condition, instrument or log, sample or serial, pass/fail, and next action.
19. Review pass: assembly and maintenance
Review assembly and maintenance for the supplementary dimension symbol at the real machine. The key risk is symbol meaning, process intent, inspection, and revision clarity. State lower and upper boundaries, the simultaneous worst combination, the evidence source, and the owner. Confirm that model, drawing, BOM, process, inspection, and work instruction use the same revision. Test normal operation, stop, restart, interruption, and a controlled fault. Record value, unit, condition, instrument or log, sample or serial, pass/fail, and next action.
20. Review pass: failure and recovery
Review failure and recovery for the supplementary dimension symbol at the real machine. The key risk is symbol meaning, process intent, inspection, and revision clarity. State lower and upper boundaries, the simultaneous worst combination, the evidence source, and the owner. Confirm that model, drawing, BOM, process, inspection, and work instruction use the same revision. Test normal operation, stop, restart, interruption, and a controlled fault. Record 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 supplementary dimension symbol at the real machine. The key risk is symbol meaning, process intent, inspection, and revision clarity. State lower and upper boundaries, the simultaneous worst combination, the evidence source, and the owner. Confirm that model, drawing, BOM, process, inspection, and work instruction use the same revision. Test normal operation, stop, restart, interruption, and a controlled fault. Record 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 supplementary dimension symbol at the real machine. The key risk is symbol meaning, process intent, inspection, and revision clarity. State lower and upper boundaries, the simultaneous worst combination, the evidence source, and the owner. Confirm that model, drawing, BOM, process, inspection, and work instruction use the same revision. Test normal operation, stop, restart, interruption, and a controlled fault. Record value, unit, condition, instrument or log, sample or serial, pass/fail, and next action.
23. Review pass: field feedback
Review field feedback for the supplementary dimension symbol at the real machine. The key risk is symbol meaning, process intent, inspection, and revision clarity. State lower and upper boundaries, the simultaneous worst combination, the evidence source, and the owner. Confirm that model, drawing, BOM, process, inspection, and work instruction use the same revision. Test normal operation, stop, restart, interruption, and a controlled fault. Record value, unit, condition, instrument or log, sample or serial, pass/fail, and next action.
24. Review pass: safety and misuse
Review safety and misuse for the supplementary dimension symbol at the real machine. The key risk is symbol meaning, process intent, inspection, and revision clarity. State lower and upper boundaries, the simultaneous worst combination, the evidence source, and the owner. Confirm that model, drawing, BOM, process, inspection, and work instruction use the same revision. Test normal operation, stop, restart, interruption, and a controlled fault. Record value, unit, condition, instrument or log, sample or serial, pass/fail, and next action.
25. Review pass: configuration and BOM
Review configuration and BOM for the supplementary dimension symbol at the real machine. The key risk is symbol meaning, process intent, inspection, and revision clarity. State lower and upper boundaries, the simultaneous worst combination, the evidence source, and the owner. Confirm that model, drawing, BOM, process, inspection, and work instruction use the same revision. Test normal operation, stop, restart, interruption, and a controlled fault. Record value, unit, condition, instrument or log, sample or serial, pass/fail, and next action.
26. Review pass: measurement and audit
Review measurement and audit for the supplementary dimension symbol at the real machine. The key risk is symbol meaning, process intent, inspection, and revision clarity. State lower and upper boundaries, the simultaneous worst combination, the evidence source, and the owner. Confirm that model, drawing, BOM, process, inspection, and work instruction use the same revision. Test normal operation, stop, restart, interruption, and a controlled fault. Record value, unit, condition, instrument or log, sample or serial, pass/fail, and next action.
27. Review pass: prototype and acceptance
Review prototype and acceptance for the supplementary dimension symbol at the real machine. The key risk is symbol meaning, process intent, inspection, and revision clarity. State lower and upper boundaries, the simultaneous worst combination, the evidence source, and the owner. Confirm that model, drawing, BOM, process, inspection, and work instruction use the same revision. Test normal operation, stop, restart, interruption, and a controlled fault. Record value, unit, condition, instrument or log, sample or serial, pass/fail, and next action.
28. Review pass: final release
Review final release for the supplementary dimension symbol at the real machine. The key risk is symbol meaning, process intent, inspection, and revision clarity. State lower and upper boundaries, the simultaneous worst combination, the evidence source, and the owner. Confirm that model, drawing, BOM, process, inspection, and work instruction use the same revision. Test normal operation, stop, restart, interruption, and a controlled fault. Record value, unit, condition, instrument or log, sample or serial, pass/fail, and next action.
MINATA release checklist
- [ ] Function, boundary, and failure symptom are written.
- [ ] Interfaces, ownership, and mistake-proofing are clear.
- [ ] Six topic checks have evidence and pass/fail limits.
- [ ] Manufacturing, assembly, inspection, and maintenance were tried.
- [ ] Revision, supplier, and configuration records agree.
Good engineering is a chain of explicit assumptions that survives manufacture, operation, maintenance, and change. For supplementary dimension symbol, evidence that the result continues to work is the MINATA standard.
Public references
- MINATA Q-up design practice and internal review checklist.
- Applicable drawing, manufacturing, safety, or documentation standard selected by the project owner.
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