optical property of coniesopticsoptimaloptimal basic feasible solutionoptimal basisoptimal block designoptimal bounded variablesoptimal controloptimal control problemoptimal decisionoptimal extreme pointoptimal feasible solutionoptimal frequencyoptimal location problem nonbasicoptimal pointoptimal policyoptimal solutionoptimal strategyoptimal systemoptimalityoptimality atoptimality conditionoptimality conditions criterion nonbasicoptimality criterionoptimalizeoptimisticoptimistic estimateoptimistic timeoptimizationoptimization problemoptimization theoryoptimizeoptimizingoptimumoptimum allocationoptimum designoptimum maintenance programoptimum outputoptimum plant sizeoptimum pointoptimum policyoptimum size of clustersoptimum work periodoptionoption samplingoptional samplingoptional timeoror elseor equal to