Examples - Exercise 1 A simulation model of a job shop was...

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Exercise 1 A simulation model of a job shop was developed to investigate different scheduling rules. To validate the model, the currently used scheduling rule was incorporated into the model and the resulting output compared to observed system behavior. System data revealed that the average time spent by a job in the shop was approximately 4 working days. The model made the following predictions on seven independent replications, for average time spent in the shop: 3.70 4.21 4.35 4.13 3.83 4.32 4.05 (a) Is model output consistent with system behavior? Conduct a statistical test using a level of significance α = 0.01. (b) If it is important to detect a difference of 0.5 day, what sample size is needed to have a power of 0.90? Interpret your results in terms of model validity or invalidity. (Use α = 0.01.) Answer to Exercise 1
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Exercise 2 Consider an ( M, L ) inventory system, in which the procurement quantity, Q, is defined by M - I , if I < L Q= 0, if I L Where I is the inventory on hand plus on order at the end of a month, M is the maximum inventory level, and L is the reorder point. Since
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Examples - Exercise 1 A simulation model of a job shop was...

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