Human Performance

Rasmussen classified human performance into 3 levels. In order of decreasing levels of familiarity with the task, these are:

• Skill-based – stored patterns of pre-programmed instructions
• Rule-based – familiar problems are addressed by application of stored rules
• Knowledge-based – novel situations in which actions must be planned, using conscious analytic processes and stored knowledge

With increasing expertise, performance moves from knowledge-based toward skill-based. Click on the images below for examples.

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