1. Operations research analysts do notA. predict future operationsB. build more than one modelC. collect relevant dataD. recommend decision and accept AnswerA. predict future operations 2. Decision variables areA. controllableB. uncontrollableC. parametersD. none of the above AnswerA. controllable 3. A model isA. an essence of realityB. an approximationC. an idealization’D. all of the above AnswerD….