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Failure Mode and Effects Analysis
Failure Mode and Effects Analysis (FMEA) is a crucial tool in determining if a particular component in a system will fail (in terms of the customer's requirements). By looking at each piece, we can rate the severity of a failure (S), the probability that it will occur (P), and the likelihood that the customer would detect the failure (D). The severity of failure is rated between 1-10, 1 being the effect is not noticed by the consumer, while 10 is hazardous. Probability of occurence is also rated from 1-10, 1 being extremely remote while 10 has an extremely high chance of occurring. Finally, detection is rated from 1-10 with 1 being almost certain to detect and 10 being no chance of detection whatsoever. With these three factors, we can multiply them together to achieve a total risk priority number (RPN) which can range from 1-1000 (1000 being the greatest risk). Below is a table outlining each part.
Fender Bridge FMEA
Part & Function | Failure Mode | Effect of failure | Causes of failure | Detection | S | O | D | RPN | Action | S | O | D | ||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
(S1) Wooden Handle
| Breaks |
| 8 | Too much force applied to handle, Wood weakened by rotting | 3 | Test strength of wood before assembly | 3 | 72 |
| Manufacturer, Designer | 8 | 2 | 3 | 48 |
(G2) Back Panel | cell 2,1 | cell 2,2 | ||||||||||||
(G3) Strings | ||||||||||||||
(G4) Springs | ||||||||||||||
(G5) Whammy Bar | ||||||||||||||
(G6) Bridge Mounting Screws | ||||||||||||||
(G7) Bridge Assembly | ||||||||||||||
(G8) Spring Claw | ||||||||||||||
(G9) Spring Claw Screws | ||||||||||||||
(G10) Saddle Plate | ||||||||||||||
(G11) Saddle Spring} | ||||||||||||||
(G12) Saddle Screw | ||||||||||||||
(G13) Neck | ||||||||||||||
(G14) Neck Mounting Plate | ||||||||||||||
(G15) Bridge Block | ||||||||||||||
(G16) Bridge Block Mounting Screws | ||||||||||||||
(G17) Guitar Body | ||||||||||||||
(G18) Bridge Plate |