FMEA — Failure Mode & Effects Analysis¶
Optional but recommended for high-risk subsystems (climber, elevator, shooter).
For each mechanism, list every way it can fail, rate severity/likelihood/detectability, and multiply for a Risk Priority Number (RPN). Highest RPN items get design mitigations.
Subsystem: Owner (student): Date:
Rating Scales¶
- Severity (S), 1–10: 1 = cosmetic, 5 = subsystem stops working, 10 = robot disqualified or damaged.
- Likelihood (L), 1–10: 1 = essentially never, 5 = once a competition, 10 = every match.
- Detectability (D), 1–10: 1 = detected before it matters (sensor + code), 10 = only found after failure.
- RPN = S × L × D. Items with RPN ≥ 100 require mitigation.
Table¶
| # | Failure Mode | Effect on Robot | S | L | D | RPN | Mitigation | Owner |
|---|---|---|---|---|---|---|---|---|
| 1 | e.g., "belt jumps teeth under load" | intake stops | 6 | 4 | 6 | 144 | tensioner + preflight torque check + spare belt | |
| 2 |
Mitigations Assigned¶
| # | Mitigation | Owner | Due |
|---|---|---|---|
| 1 |
Sign-off¶
- Subsystem Owner: ____
- Mechanical Mentor: ____