Queuing theory can be used when: The model is mathematical and simple enough The model is very complicated The model is physical The model is mathematical and complex Question 6 When we evaluate a model by determining such things as the average number of parts on the system, we are: O Performing a numerical evaluation O Analyzing the system quality Forecasting the quantities to be sold Establishing probabilities of the system Question 7 What of the following is not true about hand simulations? O They are very complex and difficult to evaluate They can include numerical experiments They are based on physical models They do not use high level programming in their evaluation Question 8 Which of the following is not a performance measure for a model? O Arriving parts to the system O Total production Average waiting time in queue Average number in the system