Expected number of arrivals per minutehour Average service time secondsminuteshours Communication cost per minutesecond (per line) Fixed agent cost per minutehour Call reward (amount gained at service completion) Abandonment time secondsminutes Acceptable waiting time secondsminutes InputOutputNumber of agents (smaller than ) InputOutputLines (smaller than ) Output average profit per minute Output abandonments % Output blocked % Output service level %

However, with high rewards economical objectives will dominate the quality of service. For example, increasing rewards can yield higher productivities and lower service levels.