What is Estimated Wait Time (EWT)?
Estimated Wait Time (EWT) is a contact-center prediction of how long a caller will wait in a queue before reaching an available agent. It is calculated from factors such as the caller’s position, the number of agents handling calls, and recent average handle times, and is often announced to callers or used to drive routing decisions.
How it works
A common estimate divides expected work ahead of the caller by available capacity: position in queue multiplied by average handle time, divided by the number of active agents. Systems refine this with real-time and historical data as conditions shift. The result can be played to callers in position and wait announcements, or compared against a threshold to send new arrivals to an overflow destination before they ever wait.
Why it matters
Communicating EWT sets caller expectations and reduces abandonment, while using it for routing prevents queues from overflowing. Because it is an estimate, accuracy depends on stable conditions; sudden spikes in volume or agent availability can make actual wait times diverge from the prediction. EWT is also a key contact-center reporting metric.
FAQ
What is Estimated Wait Time (EWT)? EWT is a prediction of how long a caller will wait in a queue before reaching an agent, calculated from factors like queue position, agent count, and recent average handle time. It is often announced to callers or used to trigger routing.
How is Estimated Wait Time calculated? Typically from the caller’s position in queue, the number of available agents, and the recent average handle time per call. Some systems use historical and real-time data or predictive models to refine the estimate as conditions change.
Related: What is ACD? · Call Queues · Overflow & Exit Destinations