1. A method for visualization of call center performance, comprising the steps of: obtaining quality performance of agents data that includes information on a quality of service and quality characteristics of the agent; obtaining call center operations data that includes information on statistics and details of a call center; discovering a correlation between the quality performance of agents data and the call center operations data, wherein the correlation is computed using one or a combination of the following methods: Pearson linear correlation, clustering computing method, and statistical trend analysis, wherein the computation using Pearson linear correlation outputs correlation coefficient r and statistical measurement p with data set size N; and optimizing call center performance based on the correlation.