Ratcheting Screwdriver Redesign
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[[Image:Screwdriver_research1.jpg|thumb|right|200px|Difficulty applying pressure]] | [[Image:Screwdriver_research1.jpg|thumb|right|200px|Difficulty applying pressure]] | ||
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[[Image:Screwdriver_research7.jpg|thumb|right|200px|Bit connection problems]] | [[Image:Screwdriver_research7.jpg|thumb|right|200px|Bit connection problems]] | ||
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| + | We asked a number of people to use a ratcheting and non-ratcheting screwdriver on a variety of normal household items. The items tested included a CD player, a towel holder, chairs, a fan, a bedframe, a vaccum cleaner, and an airsoft gun. The idea was to provide a wide array of objects and a large sample size in order to gain a new perspective on how people use the tools and the problems they often encounter. | ||
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Revision as of 14:09, 12 October 2007
Contents |
Market Research
We asked a number of people to use a ratcheting and non-ratcheting screwdriver on a variety of normal household items. The items tested included a CD player, a towel holder, chairs, a fan, a bedframe, a vaccum cleaner, and an airsoft gun. The idea was to provide a wide array of objects and a large sample size in order to gain a new perspective on how people use the tools and the problems they often encounter.
After carefully observing each of the users and interviewing them about their experiences afterwards, the most common problems experienced were:
- Applying ample pressure
- Screwing from an angle
- Determining which way the screwdriver is set up to ratchet
- Screwdriver being too long to access a screw
- Screwdriver being too short to access a screw
- Bit connection is unstable
- Bit connection point is too thick to access a screw
- Stripping screws
- Lighting issues
- Difficulties with nut/bolts
Project Schedule
The schedule for the remaining part of the project is layed out in the Gantt chart below. The milestones' occurences are denoted by a yellow triangle and have a breif description next to them. The big milestones will be the completion of Prototype 1 and Prototype 2, the Final Report, and the Design Expo. The chart is in one week increments with the red parts of the bar denoting the parts of teach task that have been completed and the cream-colored yellow represents the time remaining to complete the task. All tasks will initially be completed as a group, and will be divided up as seen fit when we are doing tasks.
Gantt Chart
Design Analysis
Pugh Chart
Value Opportunity Analysis
Aesthetics
Core Technology
Emotion
Ergonomics
Identity
Impact
Quality
Final Design
Our proposed choice of redesigns consists of several key features meant to improve upon the original design. Market research has
Ergonomic handle Pistol grip Clearly illustrated switch One hand switch operation Rotating Hand powered Trigger
loose screw
storage for bits
