Important Factors of Influence on Human Reliability

In what follows several important factors of influence on human reliability are 

Optimum reliability is attained accordingly in case of moderate stress, which is high enough to fully capture the operator s attention. 

Low stress decreases the attentiveness because uninteresting and little exacting tasks cause a decrease of attention. Low stress is applicable, for example, to routine control walks. 

An optimum stress level exists in routine operations in the control room during normal operation of a plant, maintenance, and functional tests. These activities do not lead to excessive adaptation nor are they too simple and boring. Therefore reliable performance can be assumed. 

Qualification and training of operators It may normally be assumed that the staff of complex technical installations is carefully selected and hence has a sufficient qualification. 

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