A-R05
The 3-2-1 layout concept — Reference record
Three, two and one contact groups describe a conceptual constraint arrangement for a suitable rigid part. Contact geometry still needs review.
| Reference record | Working notes |
|---|---|
| Overview | The 3-2-1 layout concept |
| Practical example | Sketch three primary supports before adding secondary and tertiary locators. |
| Limits and interpretation | Thin walls and flexible parts need analysis beyond the rigid-body sketch. |
| Document control | Reference edition 2026.11 |
Measurements and examples are descriptive, not acceptance criteria.