12/09/051 Olin CollegeHFID – Team Stilton Blue Franklin W. Olin College of Engineering, December...
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Transcript of 12/09/051 Olin CollegeHFID – Team Stilton Blue Franklin W. Olin College of Engineering, December...
12/09/05 1
Olin College HFID – Team Stilton Blue
Franklin W. Olin College of Engineering, December 09, 2005
Team Stilton Blue: Zach Brock,Luis Diego Cabezas, Alex Dorsk
Faculty Adviser:Prof. Lynn Andrea Stein
Car Sound System
Goal: to learn about interface design by designing a more usable car sound system for people in their mid-twenties.
• Our design process• Our current design• Lessons learned
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Olin College HFID – Team Stilton Blue
Overview
• User interviews
• Creation of test personas & initial designs
• Low-fi prototype testing through interviews
• Interactive prototype
• Refinement through heuristic evaluation
• Further refinement through user interviews
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Olin College HFID – Team Stilton Blue
Our design process
We interviewed passengers and drivers.
We asked them
• What they do in their cars
• How they use their current sound systems
• What they want their sound systems to do
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Olin College HFID – Team Stilton Blue
User Interviews
Identified from the user interview data.
Specific goals unique to our users:
• Being able to drive safely while using a system
• Being able to use auxiliary music players (i.e. iPods) while driving
• Being able to use cellphones while driving12/09/05 5
Olin College HFID – Team Stilton Blue
Design Goals
Our first designs had features such as:
• Large, graphical mode buttons and a touch screen
• Steering wheel controls
• Integration with a car’s main computer
• Integrated auxiliary device controls
• Cellphone controls12/09/05 7
Olin College HFID – Team Stilton Blue
Initial Designs
We tested our initial designs in the context of our personas. We also used low-fidelity paper prototypes to test our designs with real users.
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Olin College HFID – Team Stilton Blue
Testing Initial Designs
Tests with personas and paper prototypes told us how we could refine our designs.
We decided to:
• Simplify displays
• Maintain standard modes in our design
• Keep information density low
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Olin College HFID – Team Stilton Blue
Design Refinement
• Attempted to maintain familiar interactions
• The dynamic panel physically rotates to provide a different button layout in each mode
• The static panel contains the options and controls available in all modes
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Olin College HFID – Team Stilton Blue
First Interactive Prototype
Based on feedback from a heuristic evaluation we made additional changes:
• More text labels• Standardized buttons• Simplified CD interface• Linear staggered CD button mapping• Changed color of on/off button• Standardized control buttons for switching
tracks/stations12/09/05 13
Olin College HFID – Team Stilton Blue
Second Interactive Prototype
Based on user interactions with our second interactive prototype we made additional changes:
• Mode buttons light up to show current mode
• Clearer volume knob
• On/off button became only ‘off’ button
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Olin College HFID – Team Stilton Blue
Third Interactive Prototype
• Is easy to use and learn
• The simplicity limits errors
• Maintains mental model of car stereo
• Physically separates different modes
• Layout of buttons and separation of panels allows users to feel for controls, improving safety
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Olin College HFID – Team Stilton Blue
Advantages
• Limits range of interaction
• Requires adapting to current mode before using
• There is an imposed time delay due to the physical changing of modes
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Olin College HFID – Team Stilton Blue
Disadvantages
Let’s see what the first interactive prototype looks like…
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Olin College HFID – Team Stilton Blue
Demo of Final Prototype
• Testing early with users helps• Doing test run-throughs (walking through the
script, etc.) helps make tests effective• It’s hard to think of new ideas when you have
ideas that work, especially in existing or mature systems
• KISS: Keep it simple, stupid. All of our design changes involved simplifying previous designs
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Olin College HFID – Team Stilton Blue
Lessons Learned