Utilization is a feature that enables a voice interaction to interrupt an email interaction when the voice interaction has a higher priority than the email interaction. Utilization is a percentage that indicates how much of an agent's time is spent on handling interactions. When an agent is handling an email interaction, their utilization is lower than when they are handling a voice interaction. Therefore, if a voice interaction arrives in the queue and there are no other available agents, the voice interaction can interrupt the email interaction and be routed to the agent with the lowest utilization. Reference: https://help.mypurecloud.com/articles/utilization/ https://help.mypurecloud.com/articles/understand-how-email-interactions-work/