There are six major stakeholders with regards to the paper towel dispenser: Manufacturer, retailer, customer, user, society. The main needs for the manufacturer are to reduce cost and create a reliable product. For the retailer, it is being able to sell a quality product. For the customer, it is making sure it is an affordable and reliable machine. For the customer, cleanliness and ease of use are paramount. For the maintenance worker, ease of opening and replacing the paper towel are important. Society plays a role with regards to how the use of paper towel affects the ecosystem and earth in general. Listed below are the stakeholders and their respective needs.
Part No. | Name | Function | QTY | Weight | Material | Manufacturing Process | Image
|
01 | Front Housing | Protects device from exterior | 1 | 935g | Plastic | Injection Molding |
|
02 | Front Housing Clip | Holds housings together | 1 | 13g | Steel | Bending, Punching |
|
03 | Front Housing Tab | Secures housing clip | 1 | <1g | Plastic | Injection Molding |
|
04 | Rear Housing | Holds mechanical components | 1 | 986g | Plastic | Injection Molding |
|
05 | Paper Towel Holding Arm | Holds paper towel roll | 2 | 40g each | Plastic | Injection Molding |
|
06 | Phillips Head Screw (1/8 x 1/4 long) | Secures device to rear housing | 1 | 1g | Steel | Machined |
|
07 | Wall Mounting Screw (1/8 x 1.25 long) | Secures housing to wall | 4 | 3.5g each | Steel | Machined |
|
08 | Screw Anchor | Holds screw in wall | 4 | ~0.25g | Plastic | Injection molding |
|
09 | Paper Guide Tube | Guides paper towel to cutting cylinder | 1 | 55g | Plastic | Injection molding | [[Image:| 100x100px]]
|
10 | Spring (uneven hooks) | Holds 09 in place | 2 | 2g each | Metal | Extrusion |
|
11 | Spring (even hooks) | Holds lever to spindle housing | 2 | 1.5g each | Metal | Extrusion |
|
12 | Screw (3/32 x 5/8 long) | holds turning wheel and lever to spindle housing | 2 | ~1g each | Metal | Extrusion |
|
13 | Red Screw Cap | Hides screw in turning wheel | 1 | <1g | Plastic | Injection molding |
|
14 | Locking Spring | Ensures correct wheel spin direction | 1 | 4g | Steel | Extrusion |
|
15 | Red Turning Wheel | Turns main spindle | 1 | 30g | Plastic | Injection molding |
|
16 | Guide clips for 09 | Guides paper on 09 | 2 | 2.5g each | Plastic | Injection molding | [[Image:| 100x100px]]
|
17 | Screw (3/32 x 3/8 long) | Holds lever assembly together and spindle housing | 2 | <1g each | Metal | Machined |
|
18 | Lever Arm | Connects spring to spindle | 1 | 1g | Plastic | Injection molding |
|
19 | Spring Connector | Connects two springs to lever arm | 1 | <1g | Plastic | Injection molding |
|
20 | Rounded Spring Guide | Angles spring to desired measurement | 1 | <1g | Plastic | Injection molding |
|
21 | Thin Paper Guide | Guides paper out of device | 1 | 24g | Plastic | Injection molding |
|
22 | Front Spindle Housing | Final housing before paper leaves device | 1 | 132g | Plastic | Injection molding |
|
23 | Spindle Housing Back | Back of spindle housing | 1 | 162g | Plastic | Injection molding |
|
24 | Spindle Housing (L) | Left of spindle housing | 1 | 105g | Plastic | Injection molding |
|
25 | Spindle Housing (R) | Right of spindle housing | 1 | 105g | Plastic | Injection molding |
|
26 | White Spindle Guide | Holds spindle in line | 3 | 2.3g each | Plastic | Injection molding |
|
27 | Screw (3/32 x 3/8 long) | Connects spindle halves | 2 | <1g | Metal | Machined |
|
28 | Square nut | For use with 27 | 2 | <1g | Steel | Cast and drilled |
|
29 | White Teeth Guide/Arm | Guides cutting teeth in spindle | 2 | 3g each | Plastic | Injection molding |
|
30 | Cutting Teeth | Cuts paper towel | 1 | 75g | Steel | Cast, punched and bent |
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31 | Spindle Top Half | Holds cutting tool | 1 | 125g | Plastic | Injection molding |
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32 | Spindle Bottom Half | Holds cutting tool | 1 | 135g | Plastic | Injection molding |
|
33 | Metal Key | Helps open housing | 1 | 5g | Steel | Punched |
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Part No. | Name | Function | Failure Mode | Effects of Failure | S | Causes of Failure | O | Design Controls | D | RPN | Recommended Actions | Responsibility
|
01 | Front Housing | Protects device from exterior | Fractures, Warped |
- Exposure of internal components
- Possible injury to customer
| 7 |
- Improper handling
- Improper manufacturing
| 4 |
| 2 | 56 |
| Reliability
|
02 | Front Housing Clip | Holds housings together | Bends |
| 4 |
- Improper handling
- Improper assembling
| 2 |
- Material Selection
- Packaging
| 6 | 48 |
- Select a stiffer material
| Assembly and Reliablity
|
03 | Front Housing Tab | Secures housing clip | Strips |
| 2 |
- Improper assembling
- Improper manufacturing
| 2 |
- Material selection
- Mold design
| 8 | 32 |
| Assembly
|
04 | Rear Housing | Holds mechanical components | Fractures |
- Unable to hold mechanical components
| 7 |
- Improper handling
- Improper manufacturing
| 4 |
| 9 | 252 |
- Drop test
- Select a stiffer material
| Reliability
|
05 | Paper Towel Holding Arm | Holds paper towel roll | Bends |
- Unable to hold paper towel roll due to misaligned components
| 6 |
- Improper handling
- Improper manufacturing
- Incorrect design
| 3 |
- Material selection
- Mold design
| 2 | 36 |
- Select a flexible and elastic material
| Assembly and Manufacturing
|
08 | Screw Anchor | Holds screw in wall | Fractures |
- Unable to hold mechanical components
- Possible injury to customer
| 7 |
- Improper handling
- Poor upkeep
| 6 |
| 8 | 336 |
- Select a reliable material
| Reliablity
|
09 | Paper Guide Tube | Guides paper towel to cutting cylinder | Failed |
|
10 | Spring (uneven hooks) | Holds 09 in place | Deformed |
- Malfunctioning of mechanical spindle
| 3 |
| 2 |
- Material selection
- Improper assemblying
| 5 | 30 |
- Select a stiffer material
- Reduce stress on spring
| Assembly and Reliablity
|
11 | Spring (even hooks) | Holds lever to spindle housing | Deformed |
- Malfunctioning of mechanical spindle
| 3 |
- Improper handling
- Fatigue
| 2 |
- Material selection
- Improper assemblying
| 4 | 24 |
- Select a stiffer material
- Reduce stress on spring
| Assembly and Reliablity
|
14 | Locking Spring | Hides screw in turning wheel | Deformed |
- Unable to confine rotation direction of spindle
| 3 |
- Improper handling
- Fatigue
| 2 |
- Material selection
- Improper assemblying
| 4 | 24 |
- Select a stiffer material
- Reduce stress on spring
| Assembly and Reliablity
|
16 | Guide clips for 09 | Guides paper on 09 | text | text
|
18 | Lever Arm | Connects spring to spindle | Breaks |
- Malfunctioning of mechanical spindle
| 5 |
- Improper handling
- Improper manufacturing
| 2 |
| 2 | 20 |
- Select a stiffer material
| Manufacturing and Reliablity
|
19 | Spring Connector | Connects two springs to lever arm | Breaks |
- Malfunctioning of mechanical spindle
| 5 |
- Improper manufacturing
- Improper assemblying
| 2 |
- Material selection
- Mold design
| 3 | 30 |
- Select a stiffer material
| Assembly and Reliablity
|
20 | Rounded Spring Guide | Angles spring to desired measurement | Breaks |
- Unable to adjust spring to a desired angle
| 2 |
- Improper handling
- Improper manufacturing
| 2 |
| 7 | 28 |
| Manufacturing
|
21 | Thin Paper Guide | Guides paper out of device | Breaks |
- Paper ejected in inconsistent direction
- User dissatisfaction
| 4 |
- Improper handling
- Improper manufacturing
| 3 |
| 1 | 12 |
- Select a stiffer material
| Manufacturing
|
22 | Front Spindle Housing | Final housing before paper leaves device | Fractures |
| 3 |
- Improper assemblying
- Improper manufacturing
| 2 |
- Packaging
- Material selection
- Mold design
| 6 | 36 |
- Select a stiffer material
| Assembly and Manufacturing
|
23 | Spindle Housing Back | Back of spindle housing | Fractures |
| 3 |
- Improper assemblying
- Improper manufacturing
| 2 |
- Packaging
- Material selection
- Mold design
| 6 | 36 |
- Select a stiffer material
| Assembly and Manufacturing
|
24,25 | Spindle Housing (L,R) | Sides of spindle housing | Breaks |
| 5 |
- Improper assemblying
- Improper manufacturing
| 2 |
| 6 | 60 |
| Assembly and Manufacturing
|
29 | White Teeth Guide/Arm | Guides cutting teeth in spindle | Breaks |
- Malfunctioning of mechanical spindle
| 3 |
- Improper assemblying
- Improper manufacturing
| 3 |
| 6 | 36 |
| Assembly and Manufacturing
|
30 | Cutting Teeth | Back of spindle housing | Wears,Bends |
- Unable to cut papers
- User dissatisfaction
| 4 |
| 2 |
- Material selection
- Teeth design
| 2 | 16 |
| Manufacturing
|
31,32 | Spindle | Back of spindle housing | Warps,Breaks |
- Malfunctioning of machinery
| 5 |
- Improper assemblying
- Improper manufacturing
| 1 |
- Material selection
- Mold design
| 3 | 15 |
| Assembly and Manufacturing
|