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Exam 17: Material Requirements Planning MRP and ERP

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Question 51

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Each X requires 2 of component Y; each Y requires 4 of part Z. The lead time for assembly of X is 1 week. The lead time for the manufacture of Y is 1 week. The lead time for the procurement of Z is 6 weeks. The cumulative lead time for X is __________ weeks.

A) 6
B) 7
C) 8
D) 10
E) cannot be determined

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Question 52

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Each R requires 3 of component S and 3 of material A; each S requires 3 of part T. The lead time for assembly of R is 1 week. The lead time for the manufacture of S is 2 weeks. The lead time for material A is 1 week. The lead time for the procurement of T is 4 weeks. a. Construct the time-phased product structure. b. Construct the bill of material.

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Question 53

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Capacity planning in closed-loop MRP

Finite capacity scheduling, unlike MRP, recognizes the capacity limitations of departments and machines when building schedules.

The large parts of a playground A-frame (from which to hang a swing or glider) consist of a ridge pole, four legs, and two side braces. Each pair of legs fastens to the ridge with one fastener set. Each side brace requires two fastener sets for attachment to the legs. Each fastener set includes one zinc-plated bolt, one lock-washer, and one nut. There is one order outstanding, to make 80 frame kits. There are 200 legs in inventory. There are no other large items in inventory, and no scheduled receipts. Fasteners are available from the small parts area. a. Draw the product structure tree b. Calculate the net requirements to fulfill the outstanding order.

The MPS calls for 110 units of Product A. There are currently 60 of Product A on hand. Each A requires 4 of Part B. There are 20 units of B available. The net requirements for B are

Reduced inventory levels and faster response to market changes are both benefits of MRP.

A master production schedule specifies

You have seen several methods for lot sizing in MRP. Why is lot sizing important in MRP? Can too much concern be given lot sizing? Answer in a well-developed paragraph.

A(n) __________ can illustrate whether a work center has been scheduled beyond its capacity.

Lead times, inventory availability, and purchase orders outstanding are among the five things operations managers must know for effective use of MRP.

Which of the following lot-sizing techniques results in the lowest holding costs?

MRP II is accurately described as

__________ are a way of allowing a segment of the master schedule to be designated as "not to be rescheduled."

Which of the following statements regarding the gross material requirements plan is true?

The MPS calls for 50 units of Product A and 60 of B. There are currently 25 of Product B on hand. Each A requires 2 of Part C; each B requires 5 of C. There are 160 units of C available. The net requirements for C are

Explain the difference between a gross requirements plan and a net requirements plan.

What types of resources might be scheduled via an MRP II system?

If parts and subassemblies common to a variety of products are managed through the supermarket concept, formal order releases for such parts are not necessary.

A manufacturing company is trying to determine the cost of materials used to produce an A. If Fs cost $1 and Ds cost $2 how much does it cost to produce an A (in F and D materials only)?