Cognitive task analysis for prospective usability evaluation in computer-assisted surgery

  • Authors:

  • Armin Janß;Wolfgang Lauer;Klaus Radermacher

  • Affiliations:

  • Medical Engineering, Helmholtz-Institute for Biomedical Engineering, RWTH Aachen University, Aachen, Germany;Medical Engineering, Helmholtz-Institute for Biomedical Engineering, RWTH Aachen University, Aachen, Germany;Medical Engineering, Helmholtz-Institute for Biomedical Engineering, RWTH Aachen University, Aachen, Germany

  • Venue:
  • USAB'07 Proceedings of the 3rd Human-computer interaction and usability engineering of the Austrian computer society conference on HCI and usability for medicine and health care
  • Year:
  • 2007

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Abstract

Within the framework of the INNORISK (Innovative Risk Analysis Methods for Medical Devices) project, a twofold strategy is pursued for prospective usability assessment of Computer-Assisted Surgery (CAS) systems in the context of a risk management process. In one approach ConcurTaskTrees are applied to accomplish a hierarchical task analysis including temporal relations. In the other approach, based on the Cognitive Task Analysis method CPM-GOMS (Cognitive Perceptual Motor - Goals Operators Methods Selection Rules), a new technique for detecting potential contradictions and conflicts in the use of concurrent cognitive resources is generated. Within this model-based approach, extrinsic and intrinsic performance shaping factors are comprised, taking into account the specific context of modern surgical work systems. Additionally, a computer assisted usability analysis tool including the above-mentioned methods is developed to provide support for small and medium-sized enterprises in early stages of the design development process of risk sensitive Human-Machine-Interfaces in medical systems.