Failure mode and effects analysis
From DDL Wiki
FMEA is a systematic set of activities intended to help a designer to analyze the design of a system (product or process) to assure that, to the extent possible, potential failures, their associated causes, and their potential effects have been considered and addressed. FMEA aims to:
- recognize and evaluate potential failures of a product or process
- anticipate effects of each failure mode
- identify actions that eliminate or reduce the likelihood of failure or the severity of the effects of failure
- document the process
There are two major branches of FMEA widely used in industry:
- Design FMEA (study failures of the product)
- Process FMEA (study failures of the manufacturing process)
Design FMEA
| Item & Function | Failure Mode | Effects of Failure | S | Causes of Failure | O | Current Design Controls | D | RPN | Recommended Actions | Responsibility & Deadline | Actions Taken | S | O | D | RPN |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Front door
| Corroded interior lower door panels | Deteriorated life of door leading to
| 7 | Upper edge of protective wax application specified for inner door panels is too low | 6 | Vehicle general durability test veh. | 7 | 294 | Add lab. accelerated corrosion testing | Body engineering | Based on test results, upper edge spec raised 125 mm | 7 | 2 | 2 | 28 |
| Wax application plugs door drain holes | 3 | Lab test using "worst case" wax application and hole size | 1 | 21 | None |
