Abandonment rate

What it means

Abandonment rate is the share of contacts that leave the queue before reaching an agent. It is the clearest customer-side signal of a queue under strain, because unlike service level it counts the people the operation failed rather than the ones it reached.

How it is calculated

Abandonment rate = abandoned contacts / total contacts offered

Why it matters

Abandonment is the metric that exposes an operation gaming its other numbers. Handle time can be cut and average speed of answer can be improved by letting the impatient callers drop, and only abandonment rate shows the cost of that. It also feeds directly into repeat contact volume, because most people who abandon call back.

Common mistakes

• Excluding short abandons without saying so. Dropping everything under five or ten seconds is defensible, but it has to be agreed with the client and stated in reporting.
• Reading it in isolation from queue wait. A rising rate with flat wait times usually points at the announcement or the IVR path, not at staffing.
• Ignoring callback deflection. If a queue offers a callback, an accepted callback is not an abandonment and mixing them corrupts the trend.

See also

• Service LevelThe percentage of contacts answered within a target time, written as 80/20 (80% within 20 seconds).
• ASA: Average Speed of AnswerThe average wait before a queued contact reaches an agent.
• IVR: Interactive Voice ResponseThe automated phone menu that routes or self-serves callers before an agent.
• FCR: First Contact ResolutionThe share of contacts resolved on the first interaction, with no callback or transfer.