Tie Rack FMEA
From DDL Wiki
(Difference between revisions)
Current revision
FMEA
This table presents failure mode effects and analysis of parts of the product most likely to fail in their functions.
Item & Function | Failure Mode | Effects of Failure | S | Causes of Failure | O | Design Controls | D | RPN | Recmd Actions | Responsibility & Deadline | Actions Taken | S | O | D | RPN
|
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
001 - Belt Hook
| Deformed, cracked or fractured hooks. | Inoperable or Impaired Operation.
| 5 | Overstressing. Too much weight applied to hooks.
| 8 | Lab test to test maximum allowable weight applied to hooks | 4 | 160 | Stronger material used. | Hook molding | Replace hook with more durable material | 5 | 4 | 4 | 80 |
007 - Rotating Belt
| Deformed, cracked or fractured hooks or belt. | Inoperable or Impaired Operation.
| 8 | Overstressing. Too much weight applied to hooks.
| 8 | Lab test to test maximum allowable weight applied to hooks | 6 | 384 | Stronger and/or thicker material. | Belt molding | Replace belt with more durable material | 8 | 4 | 6 | 208 |
007 - Rotating Belt
| Damage to Motor or gear train. | Inoperable or Impaired Operation.
| 8 | Belt catching on Other items in closet. | 6 | Belt Allows for slip rather than stressing motor. | 6 | 288 | More flexible hooks. Bend rather than catch. | Motor selection | Use more durable motor | 8 | 4 | 5 | 160 |
018 - Motor
| Short circuit or ruining of torque mechanism. | Inoperable without functioning motor.
| 8 | *Faulty motor.
| 2 | Lab test to test maximum torque supplied by motor through gear tran | 8 | 128 | Stronger/different torque/speed motor. | Bought part. Supplier is responsible. | Replace engine with one with higher torque and lower speed | 8 | 2 | 6 | 96 |
021 - Light bulb
| Short circuit or burning out of lightbulb. | Light is inoperable.
| 4 | *Faulty bulb.
| 3 | Test lifespan of bulb. | 8 | 96 | Choose longer lasting bulbs. | Bought part. Supplier is responsible. | Replace bulb with longer-lasting bulb. | 4 | 2 | 7 | 56 |
015, 016 - Gears
| Deformed due to corrosion | Teeth will not fit well with eachother if deformed. Cannot properly translate torque and speed. | 7 | Insufficient lubrication capacity causes wear. | 3 | Lab to test lubrication necessary.
| 5 | 105 | Vary type and amount of lubrication. | Assembly applies lubrication during assembly process. | Apply more lubrication. | 7 | 2 | 4 | 56 |
011 - Top Cover
Covers interior functions (motor, gears, circuit board, batteries) | Crack or fracture exposes mechanisms. | Impaired operation: Interior mechanisms not properly protected. | 6 | Crack or break due to impact or stress overload. | 6 | Lab test to test maximum impact withstandable.
| 5 | 180 | Use material with more elasticity.
| Part engineering. Materials available with injection molding. | Replace material with stronger and less brittle material.
| 6 | 4 | 3 | 72 |
023 - Bottom Cover
Holds interior functions (motor, gears, circuit board, batteries) | Crack or fracture exposes mechanisms. | Impaired operation: Interior mechanisms not properly protected. | 6 | Crack or break due to impact or stress overload. | 6 | Lab test to test maximum impact withstandable.
| 5 | 180 | Use material with more elasticity.
| Part engineering. Materials available with injection molding. | Replace material with stronger and less brittle material.
| 6 | 4 | 3 | 72
|