QualiScan Inc. produces five models of high-quality scanners for computer sys- tems. It is now June 15, and QualiScan is planning its final assembly department schedule for the fall quarter July, August and September. The inventory on hand, final assembly hours required per scanner and forecasted demand are shown in the following table: Scanner model SC1 SC2 SC3 SC4 SC5 Inventory on hand or in production (scanners) 1700 1900 900 850 700 Final assembly time required (hours / scanner) 0.03 0.04 0.05 0.06 0.07 Forecasted demand for fall quarter (scanners) 5000 4750 3500 2250 1500 The winter quarter demand forecast is the same as that for the fall quarter. Assume that 900 final assembly hours are available in each quarter as the output of the preceding AP step. (a) Why are we facing a dissagregation problem in this example? (b) Use the aggregate runout time method to develop a final assembly pro- duction schedule for the fall quarter.