The information here is the same for answering questions 58 to 59. Find-a-Doctor is a small startup that helps people find a physician who best meets their needs (location, insurance accepted, etc). They currently have 3 staff members ta taking calls from customers. On average, one call arrives every 6 minutes. Each staff member spends 12 minutes with each customer on average. Assume that the inter-arrival time and service time are both exponentially distributed What is the average waiting time of a customer before a staff member answers their call? Choose the closest number. 2.13 minutes 0.18 minutes 10.63 minutes 5.33 minutes 25.51 minutes
Over time, the company notices that a significant portion of customers hang up after waiting 2 minutes or longer. If the company sets a performance target of 2 minutes or less for average waiting time (before a staff member answers the call), how many staff in total should be needed? Assume that all staff members have the same efficiency, i.e., an average of 12 minutes per customer. 7 5
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