1. A method, comprising: obtaining, by a computing device, call data for multiple calls received at a call center; plotting, by the computing device, individual calls of the multiple calls, based on the call data, against three behavioral measures; identifying, by the computing device, an optimal zone, among the plotted individual calls, for a selected performance metric value over the three behavioral measures; plotting, by the computing device, a particular agent's calls of the multiple calls, based on the call center data, against the three behavioral measures; identifying, by the computing device, an agent's zone, among the plotted agent's calls, for the selected performance metric value; and generating, by the computing device, a visual model of the optimal zone and the agent's zone within the context of the three behavioral measures.