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Abstract

Proponents of the Ecological Interface Design framework have recently highlighted two important assumptions: (a) the Abstraction Hierarchy (AH) would only be a representation of the work domain, not a task representation; (b) the development of an ecological display that presents information at different levels of abstraction should be based on a full implementation of the Abstraction Hierarchy. However, as revealed by our field studies, these assumptions might dismiss the role of task analysis in making the AH concrete. First, the presentation of mass balance and energy balance in an ecological display is important because these kinds of equilibrium constitute what the operator should maintain. Second, the use of an AH and its implementation in an effective work situation will probably be state-specific. Important parameters to be monitored, mass and energy balances that should be assessed, change as a function of the overall state of the process.

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Task Analysis Does Count in Making the Abstraction Hierarchy Concrete: Evidence from a Pressurized Water Reactor Situation

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