edc_2011_07 - Chapter 7: Deciding on a Design Concept...

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Chapter 7: Deciding on a Design Concept 89 CHAPTER 7: DECIDING ON A DESIGN CONCEPT Chapter outline Using test results Using design requirements and specifications Creating decision matrices Talking to the client Interviewing experts and testing more mockups Key guidelines for deciding on a design concept After testing alternatives, decide on a design concept by: analyzing test results referring to design requirements and specifications creating decision matrices that compare alternatives according to key criteria talking to your client interviewing experts testing more mockups Generating and testing alternatives will yield a great deal of information that you can use to decide on a single direction for your final design. Of course, that does not mean that you now know the details of every feature of the design you will propose. You will need to continue generating alternative components for those features, mocking them up, and testing them, but all that will be done within the context of the design concept you finally settle on. How do you decide on the key elements of the design concept that will be the focus of your further work on the project? This chapter discusses several methods for making those decisions.
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Chapter 7: Deciding on a Design Concept 90 7.1 USING TEST RESULTS If you have organized the results of your design concept clearly, aspects of your design direction will leap out at you. For instance, a team designing the interface for an electronic kiosk to give shoppers information on restaurants observed users operating three mockups: a touch screen, trackball, and key- pad. The average scores (on a scale of 1 to 5, with 5 being the best) were: Touch screen: 4.36 Trackball: 2.12 •A T M : 2 . 1 5 Because their research had already shown that the three methods were compa- rable in price and durability, the team decided on the obvious favorite—the touch screen. Sometimes, test results do not clearly favor one alternative fea- ture. When the kiosk team presented users with three alternative methods for searching by location, price, and type (of entertainment or food), they got these results: Location: 4.09 •P r i c e :
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This note was uploaded on 05/30/2011 for the course MATH 203 taught by Professor Xia during the Summer '00 term at Culver-Stockton.

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edc_2011_07 - Chapter 7: Deciding on a Design Concept...

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