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A usability evaluation framework and a case study on a supplier portal system

Babayiğit, Elif Fatma
The goal of this thesis is to provide a usability evaluation framework in the area of e-procurement technologies and a case study on this base. A survey of the concepts of human computer interaction, usability and usability evaluation techniques is carried out. Additionally current e-procurement technologies are explored and specifically a Company̕s Supplier Portal System which was employed in year 2003, as an e-procurement technology for the procurement of direct goods, is taken into consideration. Pointing from the findings of the survey, a usability evaluation methodology is developed based on user and task analysis of the Supplier Portal. Within this methodology, in terms of performance metrics of the Supplier Portal, usability attributes to be measured are determined and a checklist for a heuristic system evaluation is developed. iv While a laboratory testing structure is proposed for the case, a usability satisfaction survey and empirical usability tests are implemented with the actual users of the Company Supplier Portal. Descriptive and inferential formal analyses of the survey and field test results are studied, contributing to the Usability Evaluation of the Portal. Lastly further prospects are pointed, where usability, formal analysis, supply chain management and systems design intercept.