Queuing theory

ESCHOS Multi-Channel Queuing Model with Poisson - Arrivals and Exponential Service Times The General Directorate of Revenue (DGI) is planning to open a branch to help debtors carry out their legal procedures. You want to determine how many service personnel there should be in the branch. From past experience, the DGI knows that service time varies exponentially with an average of 15 minutes. The branch is expected to receive an average of 10 debtors per hour, although this varies in Poisson form. The branch will have a small waiting room, where people can wait for the next service staff to vacate. The National Directorate of Revenue wants there to be no more than three people on average waiting. How many customer service people are needed? a