Given this information:
Expected demand during lead time = 295 units
Standard deviation of lead time demand = 20 units
Use Table.
Determine each of the following, assuming that lead time demand is
distributed normally:
a. The ROP that will provide a risk of stockout of 2 percent during
lead time. (Round your answer to the nearest whole number.)
ROP
units
b. The safety stock needed to attain a 2 percent risk of stockout
during lead time. (Do not round intermediate calculations. Round
your answer to the nearest whole number.)
Safety stock
units
c-1. Would a stockout risk of 1 percent require more or less safety
stock than a 2 percent risk?
Less
More
c-2. Would the ROP be larger, smaller, or unaffected if the
acceptable risk were 1 percent instead of 2 percent?
Smaller
Larger
Unaffected
A. ROP = (Demand during lead time) + (Z * standard deviation of lead time demand)
Z = 2.054 (for 2% stockout, using table)
Demand during lead time = 295
Standard deviation of lead time demand = 20
ROP = 295 + (2.054 * 20) = 336.08
B. Safety stock = Z * Standard deviation of lead time demand
= 2.054 * 20 = 41.08
C.1. Stockout risk of 1 percent require more safety stock than a 2 percent risk as value of Z increases as the risk decreases.
C.2. ROP will larger as Z will increase and therefore, ROP will increase.
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