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Black&Decker Power Scrubber
Exectuve Summary
Major Product Stakeholder Analysis
We identified four major categories of stakeholders for our product. They are manufacturers, shipping & transportation companies, retailers, and consumers.
Stakeholder Objectives
Low cost raw materials
Simple manufacturing process required for materials chosen -- easy for mass production
Energy efficient manufacturing process
Recyclable materials
Easy assembly
Low cost packaging
- Shipping & transportation companies
Firmly packaged
Light weight packaging
Space efficient mass packaging
Appearance
Cost
Marketability (consumer needs)
Durability
Stakeholder Needs and Wants
|
Stakeholder | Needs | Wants
|
Consumer
|
- Product should not require much force to hold/use (proper level of vibration, weight, etc.)
- Energy efficiency (and soap usage reduction)
- Customization (comfortable to use)
|
- Maximize performance & minimize cost
- Lightweight and space efficient
- Ergonomic (material of handle part)
- Durability (especially of the sponge)
|
Retailer
|
- Cheap & durable materials
- Lower electricity(batteries) use
|
|
Manufacturer
|
- Cheap & easily processed materials
- Mass production
- Easy assembly
|
- Volume-efficient materials
|
Shipping & Transportation
|
|
- Space-efficient packaging
|
Product User Study
Mechanical Function
Parts List
Part Number
| Name
| Quantity
| Mass (g)
| Subassembly
| Function
| Material
| Manufacturing Process/ Purchased Component
| Image
|
Design For Manufacturing and Assembly
DFM
The product use standarize components for many of the components such as the screws, motor, and velcro. All the conducting metal pieces have similar dimensions, which requires fewer tools and setups during the manufacturing process. Also, most parts are made of the same material, ABS, which are easy to work with as well. Since injection modings are used for the ABS parts, not many finishing opeartions are needed. The product take advantages of the rubber rings as a seal for water proofing as well as a locking mechanism for holding parts together. The rubber rings also helps the avoid tight tolerances that can result in higher cost. For the outer shell, special process, joining ABS and rubber together are used.
DFA
Failure Mode and Effect Analysis
Item and Function
| Failure Mode
| Effects of Failure
| S
| Causes of Failure
| O
| Design Controls
| D
| RPN
| Recommended Actions
|
Battery Housing
| Battery housing comes loose
| No Power Source
| 4
| Not closing properly
| 4
| Scrubber would not turn on
| 2
| 32
| A better clicking mechanism
|
Button: ON/OFF
| Button sticks
| Can't turn on or can't turn off
| 4
| Alignment of button
| 2
| Scrubber would not turn on
| 1
| 8
| Make it a flip switch
|
Outter Shell
| Cracking
| No longer water proof
| 4
| Dropping, crushing, overheating
| 5
| Scrubber would not turn on
| 2
| 40
| Coat entire body with rubber
|
Rubber gripping/waterproofing
| Melts or wear and tear
| No longer waterproof
| 3
| Heat
| 2
| Scrubber would not turn on
| 3
| 18
| Better material choice
|
Motor-circuit board connection
| Welding of copper loosens
| Motor does not run
| 4
| Fatigue, Overheating
| 1
| Scrubber would not turn on
| 3
| 18
| Better mesh of the motor with the circuit board
|
Design For Environment
| Production
| Use
| Use
| Use
| Use
|
Item purchased
| Power Scrubber Manufacturing
| Battery
| Sponge
| Soap
| Water
|
a) Picture
|
|
|
|
|
|
b) Economic Sector Name and #
| Small Electric appliance #335210
| Primary battery manufacturing #335912
| Broom, brush, and mop manufacturing #339994
| Soap and cleaning compound manufacturing #325610
| Water, sewage and other systems #221300
|
c) Reference Unit
| 1 item
| 4 batteries
| 1 piece
| 16 oz/bottle
| 19.5 gallon/day
|
The Team
Group 3: Kelle, Robert, Pam, Ted, Ben
Team Leader: Xin (Pam) Hu
DFMA Leader: Ken-Soh (Robert) Mai
FMEA Leader: Ben Antoine
DFE Leader: Kelle Patterson
User Study Leader: Shao-Chuan (Ted) Fang
References