A bank manager is concerned with the amount of time it takes customers to complete their banking business during the afternoons, when two tellers are normally on duty. The manager has periodically counted the number of customers in the waiting line and the number of customers being served at the counter over a typical afternoon. The counts are given in the following table. The manager has also counted the total number of customers arriving and has calculated that, on average, 15 customers arrive per hour.

Observation	In Waiting Line	At Counter	Observation	In Waiting Line	At Counter
1	4	2	6	0	1
2	1	2	7	4	2
3	3	2	8	1	2
4	2	2	9	2	2
5	3	2	10	5	2

1. Task
2. Estimate the average time a customer spends waiting in line.
3. Estimate the average time customers must spend in the bank to complete their banking business.
4. Which of these throughput times do you think the bank manager will be most interested in?

Answer rating: 100% (QA)

Average time waiting in line Number of customers in waiting line Total time customers spend in waiti... View the full answer