The confidence level field sets the probability that the data calculated in the FMEDA spreadsheet will fall within the specified range of values. In short, the higher the confidence level, the more conservative the data. The user may scale this confidence level, to match the FIT calculation for other components in their system. The lower the confidence level, the smaller the raw (base) FIT rate will be. TI gives the user the ability to adjust the permanent FIT confidence level separately from the transient FIT confidence level.