Abstract
A new method for modeling the influence of errors of commission is presented. This method extends the modeling done in HRA event trees to more accurately represent the population of potential human errors associated with errors of commission. The modified HRA event trees are called commission event trees (COMETs). The fundamental difference between COMETs and HRA event trees is that COMETs model errors of commission and deal with the problem of cascading errors often encountered when errors are either intentional or latent in nature. An illustration of the application of COMET is given for an error of intention in a nuclear control scenario.
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