Systems and methods are disclosed for routing callers to agents in a contact center, along with an intelligent routing system. An exemplary method includes mapping a first portion of callers to agents according to a performance and/or pattern matching algorithm based on comparing caller data associated with the callers and agent data associated with the agents and mapping a second portion of the callers (e.g., the remaining portion callers) to agents differently than the first portion of the callers (e.g., mapping based on queue order), which may provide a control group for monitoring or analyzing the effect and/or training of the pattern matching algorithm. The first and second portion may be varied separately for each agent within the contact center. The method may further include displaying the effect of the routing on at least one outcome variable, which may include revenue generation, cost, customer satisfaction, first call resolution, cancellation, or other variable outputs from the pattern matching algorithm of the system.