Human factors is an area of study that concerns how human behaviour influences circumstances, events and outcomes. In a health and safety context this is important, due to the simple fact that virtually any undesired event or circumstance will, at some point, involve a real human being.

One element of human performance that is closely connected to human behaviour is competence, which is the ability to perform to a required standard. Many things influence a persons competence. A couple of model...
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