In this paper we propose an evaluation method that checks the inconsistency of menu operations for menu interfaces of electrical appliances. As electrical appliances have come to have too many functions, their User Interfaces have become more and more complicated. Since User Interfaces for electrical appliances, such as remote control equipment, are so designed and developed as to have low cost, cheap and simple, usability evaluation methods are necessary for them. Using a "Menu Operation Tree," our method enables not only the evaluators but also the developers to evaluate User Interfaces objectively and visually from the early stage of the development. This "Menu Operation Tree" includes the flow of operation, input device, operation characteristics and attributes, help message, and location of window mutation.
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