A crucial part of the modeling process is the evaluation of whether or not a given mathematical model describes a system accurately. This question can be difficult to answer as it involves several different types of evaluation.
A CRucIal PaRt of The modelInG ProcEss iS thE EvAlUaTion of WhETher or noT a gIven mAThEmaTical model descriBEs a sysTEM aCcurateLY. ThIs queStion can Be difficult to aNsWeR as it invOlVes SEVeRal DifFEReNt TypEs of evAluAtIon.