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Using a fuzzy comprehensive evaluation method to determine product usability: A proposed theoretical framework.

Ronggang Zhou1, Alan H S Chan2

  • 1School of Economics and Management, Beihang University, Beijing, P. R. China.

Work (Reading, Mass.)
|December 31, 2016
PubMed
Summary

This study introduces a novel usability evaluation method combining fuzzy logic and analytic hierarchical process (AHP) to address uncertainties in human judgment. The integrated metric captures effectiveness, efficiency, and user satisfaction for a more robust usability assessment.

Keywords:
Usabilityanalytic hierarchy process (AHP)fuzzy comprehensive evaluation

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Area of Science:

  • Human-Computer Interaction
  • Usability Engineering
  • Decision Science

Background:

  • Existing usability metrics often rely on subjective human judgment, failing to account for inherent uncertainties.
  • Developing an integrated usability metric comparable across products or to ideal goals remains a challenge.

Purpose of the Study:

  • To present a universal usability evaluation method integrating the analytic hierarchical process (AHP) and fuzzy evaluation.
  • To derive a hierarchical index for product usability, encompassing effectiveness, efficiency, and user satisfaction.
  • To incorporate and manage uncertain information from multiple sources in usability assessments.

Main Methods:

  • Constructed a two-layer comprehensive evaluation index based on fuzzy evaluation principles.
  • Determined membership functions via an expert panel and computed appraisals using a fuzzy comprehensive evaluation model.
  • Utilized AHP to elicit expert-defined weights for usability components (effectiveness, efficiency, user satisfaction).

Main Results:

  • The proposed method effectively characterizes fuzzy human judgments in usability evaluations.
  • An integrated index was derived, structured hierarchically across key usability components.
  • The approach successfully combines vague judgments from various product evaluation stages.

Conclusions:

  • The fuzzy evaluation method captures the inherent fuzziness and uncertainties present in human judgments.
  • This integrated framework offers a more comprehensive approach to usability evaluation compared to traditional methods.
  • The combined AHP and fuzzy approach provides a structured way to handle subjective input in usability metrics.