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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 | RPN
|
(G1) Back Panel/ Pickguard Screws
| Stripped Screw |
Lodged Screw
| *Wrong Screwdriver *Over tightening of screw | Stuck Screw | 3 | 3 | 2 | 18 |
Advise user of possibility of stripped screws
| 3 | 2 | 2 | 12
|
(G2) Back Panel
- Protects Rear Bridge Mount and Springs
| Brittle Fracture |
Exposed Springs and rear bridge
| *Dropping on a hard surface and/or a great height | Broken Plastic Pieces | 4 | 5 | 1 | 20 |
Replace plastic material with something more robust like steel or aluminum
| 4 | 3 | 1 | 12
|
(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
|
}
Description
| Standard Toaster | Clear Wall Toaster | Fold Out Toaster | Enclosed Toaster | Front Load Toaster
|
Sketch | | | | |
|
Criteria | Weight | Datum 1 | Design 1 | Design 2 | Design 3 | Design 4
|
}