| Risk Level | RPN Upper Limit | Max Composite RPN | Max Composite RPN Risk Level | |||
| PL− | S− | E− | M− | |||
| Low | 4 | 4 | 4 | 4 | 256 | 1 - 256 |
| Medium | 9 | 9 | 9 | 12 | 8748 | 257 - 8748 |
| High | 25 | 25 | 25 | 25 | 390,625 | 8749 - 390,625 |