a task analysis was performed for fixing your bicycle. Perform a SHERPA analysis of some of the tasks required to do this. The worksheet in Figure 15.6 may be used, but you may delimit the analysis to cover only the first six columns in the worksheet. it is stated that operators typically are assumed to be “as good as new” and not exposed to deterioration of performance with time. Mention examples where this assumption is not necessarily valid. How can we take these effects into account in the THERP method