1. Bob Stahl, the distribution manager at Forbes Industries, is considering using error addback for his DRP system. To evaluate its use, he compiled data for three periods on a sample product, the Scarlet Tiara. The initial DRP record is given here:

a. Develop the DRP records above for periods 2 through 4 given demands of 24, 38, and 27 in periods 1, 2, and 3.

b. Complete the same records using the error addback method. What differences occur?

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Forecast requirements In transit Projected available balance Planned shipments Q = 60; lead time = 1; SS = 10. Period 1 2 3 4 5 30 30 30 30 30 30 30 60 10 40 10 40 10 40 60 60