Power scrubber

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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

Manufacturers

 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

Retailers

 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	Lightweight Durability	Space-efficient packaging

Product User Study

Mechanical Function

Parts List

Exploded View of the Scrubber Assembly

Part Number	Name	Quantity	Mass (g)	Subassembly	Function	Material	Manufacturing Process	Image
1
2
3
4
5
6
7
8
9
10

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