Modify your solution for Exercise 7-4 to use the Expressions feature for determining the processing times (rather than assigning them in the Sequence data module). Run for a single replication of length 10,000 minutes and compare the results to those from Exercise 7-4 in a text box in your Arena model f le. Are the results different? If so, why? kel01315_ch07_311-344.indd 340 17/12/13 10:10 AM Intermediate Modeling and Steady-State Statistical Analysis 341