This paper introduces recent efforts to quantify temporal factors contributing to human error. Although these efforts were specifically derived from nuclear power plant operations, they can be applied to a variety of human factors scenarios involving safety critical systems. In contrast to earlier approaches for human reliability analysis, the present approach using the SPAR-H method considers temporal factors in relation to a wide range of performance shaping factors. It is the authors' intention to classify temporal factors in a broad human performance context, ultimately describing a richer data footing for estimating human error probabilities.
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