ABSTRACT
Usability task analysis is used for collecting user requirements and usability problems of products, GUI and so on. The process of usability task analysis is as follows. (1) The test participants check and evaluate every task of products or GUI. Every task of products or GUI is evaluated from view point of the good and bad points of the task. Test participants are asked to fill out appropriate evaluation words in the blanks in Sentence Completion Test (SCT) after operating the products. (2) The test participants check all tasks of products as the synthetic evaluation and grade using the Likert scaling. (3) The collected user requirements and problems are structured using card sorting. (4) The collected user requirements are analyzed using DEMATEL method and FCA . For an example, four staplers are examined using usability task analysis for the validation. As results, it is concluded that usability task analysis is useful method for collceting user requirements and evaluation.
