Chicago's Hard Rock Hotel distributes a mean of 1,200 bath towels per day to guests at the pool and in their rooms. This demand is normally distributed with a standard deviation of 95 towels per day, based on occupancy. The laundry firm that has the linen contract requires a 4-day lead time. The hotel expects a 99% service level to satisfy high guest expectations. Refer to the standard normal table for z-values.
a) What is the reorder point? ___towels (round your response to the nearest whole number).
b) What is the safety stock?____towels (round your response to the nearest whole number).
Given values:
Mean demand (d) = 1,200 bath towels
Standard deviation, Sigma (d) = 95 towels
Lead time (L) = 4 days
Service level = 99% = 0.99
Solution:
Using standard normal table, value of Z can be determined. For service level = 99%, Z = 2.33
(a) Reorder point (ROP):
ROP = (d x L) + [Z x Sigma (d) x SQRT(L)]
Putting the given values in the above formula, we get,
ROP = (1200 x 4) + [2.33 x 95 x SQRT(4)]
ROP = 4800 + 442.7
ROP = 5242.7 or 5243 (Rounding off to the nearest whole number)
Reorder point = 5243 towels
(b) Safety stock:
Safety stock = [Z x Sigma (d) x SQRT(L)]
Safety stock = [2.33 x 95 x SQRT(4)]
Safety stock = 442.7 or 443 (Rounding off to the nearest whole number)
Safety stock = 443 towels
Chicago's Hard Rock Hotel distributes a mean of 1,200 bath towels per day to guests at...
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