Case analysis(state all calculations and analysis processes required for analysis)

Example 1. In the fast food industry, drive-through window operations are a new trend and are in the spotlight as an important strategy. McBerger is lagging far behind its rival Mandy's in this field. The operation of the drive-through window is divided into several stages. In the first step, the customer orders. In the second step, the customer pays at the counter. Finally, at the third window, customers receive the food they ordered. Currently, the average arrival interval for customers is 45 seconds and the standard deviation is 45 seconds. In addition, the distribution of service time (including all three phases) averages 55 seconds and the standard deviation is 35 seconds. Several process management improvement measures were attempted. Answer the following questions assuming no block-out.

a. McBerger tried a new service plan. A separate kitchen has been set up to handle only orders at the drive-through window. This resulted in an average service time of 55 seconds and a standard deviation of 25. Analyze the impact of these measures on average latency. (Explain the reason.)

b. McBerger built a new sensor-recognition device in the restaurant to recognize cars ordered at the drive-through counter. This measure allows customers to directly charge their orders online by storing their order information, thereby eliminating the time to calculate at the drive-through window. Analyze the impact of these measures on average latency. (Explain the reason.)