Technical performance measurement (TPM) is a technique that compares
estimated values of key performance parameters with achieved values, and
determines the impact of any differences on system effectiveness. This
technique can be useful in risk monitoring by comparing planned and achieved
values of parameters in areas of known risk. The periodic application of this
technique can provide early and continuing predictions of the effectiveness of
risk-handling actions or the detection of new risks before irrevocable impacts
on the cost or schedule occur.