18. Develop a material requirements plan for component H. Lead times for the end item and each component except B are one week. The lead time for B is three weeks. Sixty units of A are needed at the start of week 8. There are currently 15 units of B on hand and 130 of E on hand, and 50 units of H are in production and will be completed by the start of week 2. Lot-for-lot ordering will be used for all items. A B(2) C D(2) E(2) D(2) E(4) H(3) K H(3) K

You are supposed to find the gross requirements for all of them.

Given the following MRP matrix for Item D, the planned order receipt for period 4 is ITEM: D Period Lot Size: Mul 100 LT: 1 1 2 3 4 6 Gross Requirements Schedule Receipts Project on Hand Net Requirements Planned Order Receipts 60 90 150 150 180 270 120 120 Planned Order Releases 100 200 220 DELL

Product A is made from components B and C. Item B, inturn, is made from D and E. Item C also is an intermediateitem, made from F and H. Finally, intermediate item E ismade from H and G. Note that item H has two parents. Thefollowing are item lead times:a. What lead time (in weeks) is needed to respond to a cus-tomer order for product A, assuming no existing invento-ries or scheduled receipts?b. What is the customer response time if all purchased items(i.e., D, F, G, and H) are in inventory?c. If you are allowed to keep just one purchased item instock, which one would you choose?

4.11 Given the following product tree, complete the MRP records for parts X, Y, and Z. Note that parts X and Y have specified order quantities. Y(3) Z(1) W(1) Part X Week Gross Requirements Scheduled Receipts Lead Time: 1 week Projected Available 10 Net Requirements Planned Order Receipt Planned Order Release Part Y Gross Requirements Scheduled Receipts Lead Time: 2 weeks Projected Available 30 Net Requirements Lot Size: 50 Planned Order Receipt Part J Planned Order Release Gross Requirements Scheduled Receipts Lead Time: 1 week Projected Available Net Requirements Lot Size: lot-for-lot Planned Order Receipt Part K Planned Order Release Gross Requirements Scheduled Receipts Lead Time: 1 week Projected Available Lot Size: 400 Net Requirements Planned Order Receipt Planned Order Release Z(2) 1 2 3 4 5 285 15 5 15 10 10 15 20 50

A factory has just received an order for 95 units of an end item, which are to be shipped at the start of week 8. Relevant information of the end item and the components is as follows. Lead Time On Hand Scheduled Item Order Direct (weeks) Inventory receipts Policy Components End item 15 lot for lot A(3), B(2) A 2 10 33 at week 3 lot for lot C(1), D(4) B. 2 20 15 at week 4 lot for lot D(2) min. of 500 lot for lot 100 20 Develop the material requirements plan (please print out an empty MRP table to work with), and determine how many units of component Care needed in the "planned order release". Input should be an exact number.

Given the following MRP matrix for Item D:   The planned order receipt for period 6 is

3. Item Z has a lead time of two weeks; A, B, C and D take one week each and E takes 3 weeks. Fifty units of Z are required in period 10. Assume that there is currently no inventory on hand of any of these items. Consider the following Bill of material and develop an MRP schedule for A, B, C, D and E showing gross and net requirements and order releases and order receipt dates. Assume Lot-for-lot ordering. C(3) A(2) Z D(4) E(2) B(4) Level 0 1 2 3

One unit of A is made of one unit of B and one unit of C. B is made of four units of C and one unit each of E and F. C is made of two units of D and one unit of E. E is made of three units of F. Item C has a lead time of one week; Items A, B, E, and F have two-week lead times; and Item D has a lead time of three weeks. Lot-for-lot (L4L) lot sizing is used for Items A, D, and E; lots of size 50, 100, and 50 are used for Items B, C, and F, respectively. Items A, C, D, and E have on-hand (beginning) inventories of 15, 55, 100, and 10, respectively; all other items have zero beginning inventory. We are scheduled to receive 10 units of A in Week 1, 100 units of C in Week 1, and 100 units of D in Week 3; there are no other scheduled receipts.If 50 units of A are required in week 10, use the low-level-coded bill-of-materials (product structure tree) to find the necessary planned-order releases for all components. (Leave the cells blank, whenever zero (0) is required.)

The MRP gross requirements for Item X are shown here for the next 10 weeks. Lead time for A is two weeks, and setup cost is $10. There is a carrying cost of $0.02 per unit per week. Beginning inventory is 72 units. WEEK 1 2 3 4 5 6 7 8 9 10 Gross requirements 21 12 15 45 10 30 100 20 40 150 Use the least total cost lot-sizing method to determine when and for what quantity the first order should be released. Least total cost method indicates that periods units should be ordered to cover the needs for