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Analysis of the results show that machines B and F are
the most highly utilized. The mean number in the system
shown in cell J8 is the number of all four products. To
compute the number of an individual product, we must first
find the throughput time for the product by adding the station
times for the machines through which the products pass.
For example product 1 passes through machines A, B, E and
F. Adding the mean times for each of these stations we find
the throughput time for product 1, that is 0.789 months.
Multiplying this by the flow rate of the product, which
is 30 per month, we find the mean number of product 1 in
the system, 23.67. This is the Work-in-Process, or WIP,
for the product.
Many kinds of analysis of this system are possible using
the Queuing network model.
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