Closed-form solutionsareattractivefortwomainreasons.First,
they allowresearcherstodevelopanalyticalresultsthatare
unattainable formodelsthatmustbesolvednumerically.For
example,classicalresultsabouttheEOQmodel,suchasthe
equalityoftheaverageorderingandholdingcostsatoptimality,
the famoussensitivityanalysisresult,andtheimpactofchangesin
the problemparametersontheoptimalsolution,dependonthe
availabilityofclosed-formexpressionsfortheoptimalorder
quantity and its cost.