The stress history uniquely defines the sequence and magnitude of the individual stress events applied at a specific location.  While this information is essential for conducting a cycle-by-cycle crack growth analysis that accounts for load interaction, it is both difficult to use and interpret without computer programs that perform such analyses.  One of the side benefits associated with describing flight-by-flight crack growth rates as a function of a characteristic stress-intensity factor is that one is forced into presenting stress history information simply.  This subsection addresses two such schemes – the exceedance curve and an RMS characterization.