Production, Capacity And Material Planning Page 49

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Material Requirements Planning
?
Inventory at level 0 and 1? Safety stock
AD
x
x
2
2
50
800
=
=
=
Q
tons
10
ic
800
ß = 0,95 => z = 0,71
s = zστ = 0,71x3,54 = 2,51 tons
Suppose we keep inventory in level 0 only, i.e., n = 1:
Q
10
=
+
=
+
=
I
s
tons
) 1 (
, 2
51
, 7
51
2
2
Suppose inventory is maintained at both level 0 and level 1, i.e., n = 2:
=
=
I
I
tons
(
) 2
2
(
) 1
10
,
62
The safety stock in each level is going to be:
s
, 2
51
=
=
tons
, 1
77
2
2
Production Management
148

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