| Summary: | 博士 === 國立清華大學 === 工業工程與工程管理學系 === 95 === Usability has been regarded as a method to enhance brand image, product value, and customer loyalty. However, researches have shown that usability is very often neglected due the resource constraints. The ever-shortening lifecycle of a product also makes worse the situation. In addition, people in charge of different aspects of a product often have different mindsets toward usability. Therefore, it’s needed to provide a way to integrate usability methodology into the process of product development without incurring too much consumption of the already limited resource.
In this thesis, a framework called FSM-GOMS, combining a formalism called Finite State Machine (FSM) and GOMS (an acronym for Goals, Operators, Methods, and Selection rules), is proposed. By singling out common traits of these two methods, a suggested flow of integrating the two is put forward and described with the help of illustrative examples. A simulated Computer-based Procedure (CBP) system is used as the subject of case study as a means to validate and discuss the proposed framework. The simulated CBP system also doubles as a research platform for the evaluation of three design features of CBP systems, which was conducted with experimental method.
From the case study, the application of the proposed framework revealed problems that are not otherwise available if either method was applied alone. As to the experimental evaluation of the three design features, embedded control/parameter display was found to be superior in terms of performance, but other implications were also found. Comparing the findings of the case study with those of experimental evaluations, it was found that each method shed light on different facets of usability problems. In the future, potentials of the FSM-GOMS framework can be fully utilized with the realization of the framework as a toolset.
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