decision making bodydecision making under certaintydecision making under conflictdecision making under riskdecision making under uncertaintydecision modeldecision problemdecision ruledecision spacedecision symboldecision tabledecision theorydecision treedecision variabledecision variablesdeckdeclarative sentencedeclinationdeclinedeclining balance methoddeclivitydecodedecoderdecodingdecoilerdecomposabledecomposable into particular eventsdecomposable setdecomposedecomposible operatordecompositiondecomposition into prime factorsdecomposition into primesdecomposition of a fractiondecomposition of a matrixdecomposition of event into particular eventsdecomposition of vectordecomposition principledecoposible operatordecreasedecreasingdecreasing cost industrydecreasing divided differencesdecreasing failure ratedecreasing functiondecreasing function of one variabledecreasing mappingdecreasing marginal rate of substitutiondecreasing sequencedecreasingly