A graduate research assistant moonlights at the short order counter in the student union snack bar in the evenings. He is considering asking for help taking orders, but needs to convince the management that they should hire another student. Because he is taking a simulation class, he thinks it may be the perfect way to convince management to hire more help if he can show that customers have to wait a long time. When a customer arrives, he takes their order and their payment, prepares the food, gives it to the customer, and then takes the order from the next person in line. If someone arrives while he's cooking an order, they have to wait until he's completed the current order. He has simulated 5 orders. Customer Customer Time of Time Order Order Prep Customer Number Arrival Receives Triken Time Wait Time Food 1 2 2 4 6 0 14 14 7 3 6 4 2B 8 5 33 2 19 4 Average customer waiting time is: 2 minutes a minutos 1 minute C 2.5 minutes Study of waiting-line models helps operations managers better understand: shop-floor control activities. O service systems such as amusement park rides. O service systems such as bank teller stations. O maintenance activities that might repair broken machinery all of these The activities summarized in the following table must be preformed by the promoter of a country music concert in Dallas. Activity Expected Time (in days) Immediate Predecessors A. Find location 4 B. Hire opening act 3 A C. Hire technicians 3 A D. Set up radio ads 2 B E. Distribute tickets 5 B F. Rent sound and lights 2 B.C G. Set up newspaper ads 3 H. Hire security 1 F 1. Conduct rehearsal 2 H Suppose each activity has a standard deviation of 0,5 days. What is the probability that the project can be completed in 10 days? If there are multiple critical paths, then use the critical path with the largest standard deviation) 0.04 or less More than 0.04 but less than 0.15 0.15 or more B a The activities summarized in the following table must be preformed by the promoter of a country music concert in Dallas. Activity Expected Time (in days) Immediate Predecessors A. Find location 4 B. Hire opening act 3 A C. Hire technicians 3 A D. Set up radio ads 2 B E. Distribute tickets 5 B F. Rent sound and lights 2 B,C G. Set up newspaper ads 3 B H. Hire security 1 I. Conduct rehearsal 2 H F What is the effect of a delay of 1 day in distributing tickets? no impact the project will delay by 1 day the project will delny by more than 1 day same as the effect of a delay of 1 day in setting up radio ads For a moving average forecast of ordern, it becomes responsive to a true change in mean level demand as n decreases. For a simple exponential smoothing forecast, it becomes responsive to a true change in mean level demand as the smoothing factor increases. More, less None of the above less, more less, less More, more
