02 Jun Question 8) Oh No!, Inc., sells three models of radar detecto
Question
8) Oh No!, Inc., sells three models of radar detector units. It buys the three basic models (E, F, and G) from a Japanese manufacturer and adds one, two, or four lights (component D) to further differentiate the models. D is bought from a domestic producer.
Lead times are one week for all items except C, which is two weeks. There are ample supplies of the basic units (E, F, and G) on hand. There are also 10 units of B, 10 units of C, and 25 units of D on hand. Lot-sizing rules are lot-for-lot ordering for all items except D, which must be ordered in multiples of 100 units. There is a scheduled receipt of 100 units of D in week 1.
The master schedule calls for 40 units of A to be produced in week 4, 60 units of B in week 5, and 30 units of C in week 6. Prepare a material requirements plan for D and its parents.
10)Assume that you are the manager of Assembly, Inc. You have just received an order for 40 units of an industrial robot, which is to be delivered at the start of week 7 of your schedule. Using the following information, determine how many units of subassembly G to order and the timing of those orders, given that subassembly G must be ordered in multiples of 80 units and all other components are ordered lot-for-lot. Assume that the components are used only for this particular robot. Order 160 in wk 2
Robot
B
G
C(3)
E
F
G(2)
H
12)A firm that produces electric golf carts has just received an order for 200 carts, which must be ready for delivery at the start of week 8. Information concerning the product structure, lead times, and quantities on hand is shown in the following table. Use this information to do each of the following:
a. Construct a product tree.
b. Construct an assembly time chart.
c. Develop a material requirements plan that will provide 200 golf carts by week 8 assuming lot-for-lot ordering.
13. Refer to Problem 12. Assume that unusually mild weather has caused a change in the quantity and timing of orders for golf carts. The revised plan calls for 100 golf carts at the start of week 6, 100 at the start of week 8, and 100 at the start of week 9.
a. Develop a master schedule for this revised plan.
b. Determine the timing and quantities for orders for tops and bases.
c. Assume that equipment problems reduce the firm’s capacity for assembling bases to 50 units per week. Revise your material plan for bases to reflect this, but still meet delivery dates.
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