Agan Interior Design provides home and office decorating assistance. In normal operation an average of 3 customers arrive per hour. One design consultant is available to answer customer questions and make product recommendations. The consultant averages 12 minutes with each customer.

a. Compute operating characteristics for the customer waiting line.

b. Service goals dictate that an arriving customer should not wait for service more than an average of 5 minutes. Is this goal being met? What action do you recommend?

c. If the consultant can reduce the average time spent with customers to 8 minutes, will the service goal be met?