Chapter 12 – MRP and ERP
74. Given the following information, construct a product tree diagram and develop a material
requirements plan that will lead to 400 units of product P being available at the start of week
7.
Chapter 12 – MRP and ERP
75. Develop a material requirements plan for end item P and its components, given the tree
below. Assume that all lead times are one week, and that lot-for-lot ordering is used except
for item F, which is ordered in multiples of 400 units.
One hundred units of P should be available at the start of week 4 and at the start of week 8.
Beginning inventories are: 20 P, 100 A, and 200 F.
Scheduled receipts are: 800 F at the start of week 1.
Chapter 12 – MRP and ERP
76. Given the following data, construct a material requirements plan which will result in 100
units of Parent #1 (P1) at the beginning of week 6, and 200 units of Parent #2 (P2) at the
beginning of week 8:
Chapter 12 – MRP and ERP
77. End item Alpha’s product structure tree and inventory information are as follows:
(A) If 50 units of Alpha are to be assembled, how many additional units of S will be needed?
All parts can be ordered using lot-for-lot ordering, except M, which must be ordered in
multiples of 40 units. [Hint: You don’t need to do an MRP plan.]
(B) An order for 100 units of Alpha is scheduled to be shipped at the start of week 9. When is
the earliest that any particular component must be started so that the order for Alpha will be
ready to ship? [Hint: You don’t need to do an MRP plan.]
Chapter 12 – MRP and ERP
Refer to this product-tree:
78. If 17 Ps are needed, and no on-hand inventory exists for any items, how many Cs will be
needed?
Chapter 12 – MRP and ERP
79. If 17 Ps are needed, and on-hand inventory consists of 10 As, 15 Bs, 20 Cs, 12 Ms, and 5
Ns, how many Cs are needed?
80. If 40 Ps are needed, and on-hand inventory consists of 15 Ps and 10 each of all other
components and subassemblies, how many Cs are needed?
Chapter 12 – MRP and ERP
Bunny Helpers, Inc. has just received an order for 100 Deluxe Easter Baskets, which must be
ready for delivery at the start of week six. An MRP planner has prepared the following table
showing product structure, lead times (orders are lot-for-lot), and quantities on hand:
Each Deluxe Basket contains two dark chocolate truffles and four carved chocolate eggs;
additionally one bottle of Alka-Selzer is included for those who overindulge.
81. What is the net requirement for Dark Chocolate Truffles to fill this order?
Chapter 12 – MRP and ERP
82. When should an order for Carved Chocolate Eggs be released?
83. How many Dark Chocolate Eggs should be ordered?
Chapter 12 – MRP and ERP
84. If the firm is using a fixed period lot size of two periods, what is the order size for the first
order?
85. Which of the following represents an attempt to balance the benefits of stability against
the benefits of responding to new information?
Chapter 12 – MRP and ERP
86. Comparing known and expected capacity requirements with projected capacity
availability is the job of _______.
87. ERP’s primary value comes from applications ________.
Chapter 12 – MRP and ERP
88. Net requirements for component J are as follows: 60 units in week 2, 40 units in week 3,
and 60 units in week 5. If a fixed-period, two-period lot-sizing method is used, what will be
the quantity of the first planned receipt?
89. Net requirements for component J are as follows: 60 units in week 2, 40 units in week 3,
and 60 units in week 5. If a fixed-period, three-period lot-sizing method is used, what will be
the quantity of the first planned receipt?