Traditional validation of mathematical models by visual comparison between recorded values and model calculations is regarded as too lenient. The distortion method described provides a practical quantitative validation procedure, in which the distortion that the model must undergo to match a rig or plant test record precisely is used to gauge the model. A numerical fidelity index has been derived.
Butterfield, M.H. and Thomas, P.1986. 'Methods of quantitative validation for dynamic simulation models - Part 1: Theory; Part 2: Examples. Trans InstMC8, (4).
