What is the primary method in which airlines adjust to short-term fluctuations in customer demand? Part 2 A. denial of service B. changes in inventory C. personnel availability D. postponement of service that are held in inventory to reduce stockouts are called Part 2 A. just-in-time inventory. B. safety stock. C. demand variance. D. reorder point. What is the primary difference between time-series and associative forecasting models? Part 2 A. Time-series models are only used for economic forecasts B. Associative models incorporate variables that might influence the quantity being forecasted C. Associative models do not predict demand D. Time-series models are only used for long-range forecasts