Tie Rack FMEA
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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
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