Simulation and modeling - Old Questions

The multi server queue consists of multiple servers and a common queue for all items. When any item requests for the server, it is allocated if at-least one server is available. Else the queue begins to start until the server is free. In this system, we assume that all servers are identical, i.e. there is no difference which server is chosen for which item.

The total server utilization for N server system is 

ρ = λ/μN

    where, μ = service rate and  λ = arrival rate

                        Fig: Multi server queue