How VICIdial calculates estimated hold time

If you have switched on Play Estimated Hold Time, callers now hear a wait figure, and sooner or later someone asks where that number comes from. It is not a random guess and it is not a fixed value you type in. VICIdial works it out from what is happening in the queue at that moment. Understanding the inputs helps you set sensible expectations and explain why the figure moves around during the day.

It is a live prediction, not a fixed value

The Estimated hold time a caller hears is calculated fresh each time, based on conditions in that Ingroup at that second. In plain terms, it looks at how many callers are already waiting in the Call queue, how many agents are free or about to free up, and how long calls have been running. Put those together and you get a reasonable forecast of how long this caller will sit before an Agent picks up.

Because it reads live data, the figure naturally shifts. Mid-morning with a full roster of agents, it might say under a minute. During a lunchtime rush with a thin crew, the same in-group could quote several minutes. That movement is the feature working correctly, not a bug.

The one timing setting you control

The setting that decides when the calculation happens is Calculate Estimated Hold Seconds. This is the number of seconds a caller waits in the queue before VICIdial works out the estimate and, if Play Estimated Hold Time is on, announces it. The default is 0, but in practice the minimum that takes effect is 3 seconds, so even a 0 or 1 setting still waits 3.

Giving the call a few seconds before measuring matters. Right at the instant a call arrives, the queue picture can be noisy. Letting it settle produces a steadier, more believable number. If you want the estimate announced quickly, keep this low; if your traffic is spiky and you want a calmer figure, nudge it up a little.

Why the estimate is not a promise

Treat the figure as a forecast. It reflects conditions when it was calculated, and those can change in the seconds after the caller hears it. A burst of new calls, or a handful of long Talk time conversations finishing later than expected, can push the real wait past what was announced. That is normal for any queue prediction. The value is still worth playing, because a rough heads-up beats silence for most callers.

Using the number to make routing decisions

Once VICIdial is calculating a hold time, you can do more than read it aloud. The same estimate can drive routing, so a caller facing a long predicted wait is offered a callback or sent somewhere else. That logic is the Estimated Hold Time Option, and it is one of the more useful tools for protecting your Service level. The wider queue picture is laid out in the inbound call handling guide, and if your numbers keep climbing, our piece on callers stuck on hold walks through fixes.

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