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Intercae evaluation of the new prototype based on the AK95 by using cognitive walkthrough
2001 (English)Independent thesis Advanced level (degree of Master (One Year)), 10 credits / 15 HE creditsStudent thesis
Abstract [en]

Human error lies everywhere and every field. It is one of the important factors which could lead to various accidents in highly risky fields. As a usability inspection method, Cognitive Walkthrough (CW) was developed in an effort to bring cognitive theory closer to practice, to enhance the design and evaluation of user interfaces in industrial settings. In this paper, CW was made as a new trial on medical device in medical field. It was used to evaluate two interfaces of the Hemodialysis machine: the Operator's panel of the AK95 which was regarded as a standard machine, the Operator's panel of a new prototype. Two types of interview were carried out to get good domain knowledge on dialysis work and to obtain good task descriptions. Two task scenarios were selected according to the actual situation and similarities of the two interfaces. Several cognitive tools were selected to analyze the evaluation results. With the help of Rasmussen's (1983) taxonomy, two types of underlying errors were found out on both interfaces. The comparison of the results in the two task scenarios showed that the new interface was improved in terms of error ratio and correction work in the two task scenarios, but there were still some improvements which need to be made on the new interface. It is found out that CW is applicable in medical field. And it is proposed that there might be helpful to get overall domain knowledge on the design if there exists a manufactured interface, therefore this gives help on evaluating the interface of a new prototype. As a qualitative and popular usability inspection method, CW is expected to be improved through more exploration and modification.

Place, publisher, year, edition, pages
Keyword [en]
Technology, cognitive walkthrough, human errors, design, user interfaces
Keyword [sv]
URN: urn:nbn:se:ltu:diva-48404ISRN: LTU-EX--01/108--SELocal ID: 5dad1c62-ebc5-4dd9-8988-0ecffc8d2f15OAI: diva2:1021746
Subject / course
Student thesis, at least 15 credits
Educational program
Ergonomics, master's level
Validerat; 20101217 (root)Available from: 2016-10-04 Created: 2016-10-04Bibliographically approved

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