Operations and Supply Chain Management The Core

MATERIAL REQUIREMENTS PLANNING chapter 9 287
a. Draw the bill-of-materials (product structure tree).
b. If 100 units of X are needed in week 10, develop a planning schedule showing when each
item should be ordered and in what quantity. Assume we have no inventory in any of the
items to start.
Solution
a.
X
Y (2) Z (3)
A (1) B (2) A (2) C (4)
3 4 5 6 7 8 9
10
X
LT = 1
100
100
Y
LT = 2
200
200
Z
LT = 3
300
300
A
B
LT = 2
LT = 1
600
200
600
400
200
400
C
LT = 3
1,200
1,200
b. The orders are circled.
SOLVED PROBLEM 2
Product M is made of two units of N and three of P. N is made of two units of R and four units of S.
R is made of one unit of S and three units of T. P is made of two units of T and four units of U.
a. Show the bill-of-materials (product structure tree).
b. If 100 Ms are required, how many units of each component are needed?
c. Show both a single-level parts list and an indented parts list.
Solution
a.
M
N (2) P (3)
R (2) S (4) T (2) U (4)
S (1) T (3)
b. M = 100 S = 800 + 400 = 1,200
N = 200 T = 600 + 1,200 = 1,800
P = 300 U = 1,200
R = 400