From the system design viewpoint, the main issue in ergonomics is to determine the requisite, or absolutely essential compatibility of the artifact-human system, and use it as a reference point for system improvements. Cognitive ergonomics aims to assure such requisite compatibility in the functioning of the artifact-human-systems with respect to complex and uncertain (cognitive) inter-relationships between system users, machines, and the environments. Such analysis must account for natural fuzziness and nonlinear dynamics of human cognitive processes. This paper examines some of the critical issues and methodological needs for future development of cognitive ergonomics. The modelling paradigm with respect to cognitive performance on physical tasks is also discussed.
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