| Summary: | 碩士 === 大同大學 === 工業設計學系(所) === 93 === Due to intensive competition in the market of consumer electronics, new products are being launched with relatively short life cycles. Many manufacturers have established in-house design team in hope of designing ideal product interfaces that enhance competitiveness of their products. With a purpose to reduce workload of designers and improve quality of product interface, this paper focused on mobile phone menu interfaces. Case based reasoning software (CBR-Works) was applied in the construction of a case based reasoning system for mobile phone menu interface design. A design team was aided with this system in the design of mobile phone menu operation interface, while another team, as the control group, was not given this system. Finally, RapidPLUS, a product user interface development tool, was used in the simulation of these two mobile phone menu interface prototypes for experiment.
In the process of interface design, the case based reasoning system for mobile phone menu interface design extracted many mobile phone attributes. Therefore, designers of the Group 1 who were aided by this system naturally consider attribute values and the correlations between attributes. And when the system conducts case adaptation, not only that better design cases are provided to the designer but that designers can be reminded to notice why the system conducted such adjustment on the case attribute. Thus, for the designers, more thinking and applications of the rules may be inspired.
As for the interface layout, numerous differences were found between Interface A designed by designers of Group 1 and Interface B of Group 2. First, both groups adopted matrix style for the main menu, but their layouts differed. Interface A had the texts disposed in the lower part of the display screen while Interface B had it in the center. Second, Interface A applied lists in the submenu while Interface B adopted page type. Greater difference is found in the function keys. Interface A used the left hard key for “enter”, right hard key for “back”, and the soft key in the middle for menu button, while Interface B had the right soft key as “enter”, left soft key for “back”, and hard key in the middle for menu button. Experimental tests and statistical analysis revealed that operation performance of Interface A surpassed Interface B in the following aspects: (1) Accumulative redundant step count in the navigation of target submenu function item, (2) Accumulative operation error count while opening the target function menu, (3) Total accumulative redundant step count, and (4) Total accumulative operation time. Thus it is verified that the case based reasoning system constructed in this study may indeed effectively improve the quality of product interface design of mobile phones. It is hoped that this paper may provide further understanding on the case based reasoning system for menu interface design of mobile phone among the public, so as to promote collaboration in the development of relevant systems that help future designers reduce workload, and thus enhance the quality of product interface.
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