8. Melnick Mines uses a special type of hardened crusher ball for preparing the ore. Purchasing the balls is managed with time-phased material planning. The following records are for two successive weeks:

Week Part: Crusher Ball 1 2 3 4 5 6 7 8 Gross requirements 25 25 25 25 25 25 25 25 Scheduled receipts 80 Projected available balance 20 −5 50 25 80 55 30 85 60 Planned order release 80 80 Q = 80, SS = 20, LT = 3.

Week Part: Crusher Ball 2 3 4 5 6 7 8 9 Gross requirements 25 25 25 25 25 25 25 25 Scheduled receipts 80 Projected available balance 70 45 20 75 50 25 80 55 30 Planned order release 80 Q = 80, SS = 20, LT = 3.

a. What transactions made during week 1 would result in the record as of week 2 (assuming no scrap losses)?

b. How would this set of transactions be changed if rate-based scheduling and JIT-based shopfloor control were implemented at the vendor with lead time one day?