Ice cream maker
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| - | ! | + | ! Item & Function !! Failure Mode !! Effects of Failure !! S !! Causes of Failure !! O !! Design Controls !! D !! RPN !! Recommended Actions !! Responsibility & Deadline !! Actions Taken !! S<sup>*</sup> !! O<sup>*</sup> !! D<sup>*</sup> !! RPN<sup>*</sup> |
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| Mechanical Failure: Gear train may strip | | Mechanical Failure: Gear train may strip | ||
| - | | The rotation of the motor will not be transferred to the product || 8 || The increased friction in between the separate gears can cause the gears to strip || 2 || Testing the durability of the gears || 3 || 48 || Test different materials to find the most | + | | The rotation of the motor will not be transferred to the product || 8 || The increased friction in between the separate gears can cause the gears to strip || 2 || Testing the durability of the gears || 3 || 48 || Test different materials to find the most cost-effective solution|| Gear Manufacturer || N/A || 8 || 2 || 3 || 48 |
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| + | | Mixing Arm | ||
| + | * Plastic piece that mixes the contents of the bowl | ||
| + | | Mixing arm breaks/fails | ||
| + | | Contents of the bowl will not be properly mixed to form a consistent product. | ||
| + | | 4 || The increased viscosity of the product may cause the mixing arm to break. || 3 || Test to see the breaking point of the mixing arm. || 1 || 12 || Test different materials to find the most cost-effective solution || Manufacturer || N/A || 4 || 3 || 1 || 12 | ||
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[[Ice cream maker DFE]] | [[Ice cream maker DFE]] | ||
Revision as of 12:25, 23 September 2007
| Item & Function | Failure Mode | Effects of Failure | S | Causes of Failure | O | Design Controls | D | RPN | Recommended Actions | Responsibility & Deadline | Actions Taken | S* | O* | D* | RPN* |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Motor
| Electrical failures: Motor may overheat and fail | Product will not mix the ice cream, and the product may not have good consistency. | 8 | Motor may overheat when the ice cream starts solidifying. The increased viscosity of the ice cream may add too much torque on the motor. | 6 | Testing with different types of ice cream and find the point when the load applied is too high | 3 | 124 | Find a controller that will turn off the motor once the torque applied to the motor gets too high | Motor Manufacturer | Integrate a current sensor into the design | 8 | 1 | 3 | 24 |
| Mechanical Failure: Gear train may strip | The rotation of the motor will not be transferred to the product | 8 | The increased friction in between the separate gears can cause the gears to strip | 2 | Testing the durability of the gears | 3 | 48 | Test different materials to find the most cost-effective solution | Gear Manufacturer | N/A | 8 | 2 | 3 | 48 | |
Mixing Arm
| Mixing arm breaks/fails | Contents of the bowl will not be properly mixed to form a consistent product. | 4 | The increased viscosity of the product may cause the mixing arm to break. | 3 | Test to see the breaking point of the mixing arm. | 1 | 12 | Test different materials to find the most cost-effective solution | Manufacturer | N/A | 4 | 3 | 1 | 12
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