1. A method for assessing whether adjustment factors used in a process for testing or monitoring an operational system need to be updated, the method comprising the steps of: (a) selecting at least one current adjustment factor used in the testing or monitoring process; (b) selecting data relevant to the at least one current adjustment factor; (c) analyzing relevant data to generate analysis results for determining whether the selected at least one current adjustment factor needs to be changed; (d) collecting the analysis results so that a determination can be made as to whether the selected at least one current adjustment factor needs to be changed; (e) determining from the collected results whether the selected at least one current adjustment factor needs to be changed; (f) if the selected at least one current adjustment factor needs to be changed, changing the selected at least one current adjustment factor to provide at least one updated adjustment factor.