Ratio dialing vs predictive dialing in VICIdial

Ratio and predictive dialing both do the same basic trick: they place more calls than you have free agents, so somebody is usually picking up the moment an agent comes off a call. The difference is who's holding the throttle. With ratio, that's you. With predictive, it's the algorithm. Picking between them comes down to how much you trust the math versus how much you want a steady, knowable pace.

Ratio: you set the number and it sticks

Set the Dial Method to RATIO and you choose the dial level by hand. A level of 2.0 means VICIdial keeps two lines open per active agent, full stop. It doesn't watch your answer rate, doesn't adjust mid-shift, doesn't second-guess. If your leads warm up or cool off, the line count stays put until you change it. That predictability is the whole appeal of ratio dialing: what you set is exactly what runs.

The trade-off is that you carry the tuning burden. Set it too high and your drops climb. Set it too low and agents wait. There's no automatic correction, so ratio rewards a manager who watches the real-time screen and nudges the number when the situation shifts.

Ratio does have one quiet safety net. The auto dial level threshold can drop the dial level back to 1.0 if your logged-in agent count falls below a minimum you set, so a couple of people stepping away doesn't leave the system firing line counts that were meant for a full floor. Beyond that, what you set is what runs, which is the appeal: you can predict the behavior in your head.

Predictive: the dialer drives

Switch to any ADAPT method and you're in predictive dialing. The dial level locks at 1.0 and the algorithm takes over, raising and lowering line counts based on recent answer patterns and steering toward your drop percentage limit. You stop micromanaging the number and instead set boundaries: a maximum dial level, a target drop rate, and how aggressive you want it.

The catch is that prediction needs data. It averages recent calls to guess what's coming, so it shines with a healthy crowd of agents and gets twitchy with only one or two. It also reacts on a delay, taking 15 to 30 seconds to respond to a big swing, which is fine in steady conditions but feels sluggish if your call quality lurches around.

Predictive also comes in flavors, which ratio doesn't. You can pick a version that taper your pacing toward a shift stop time, one that holds a strict ceiling on drops, or one that targets an average. That choice lets you match how the dialer polices your drop limit to how strict your compliance posture is, something a flat ratio number simply can't express.

Which one fits you

A rough rule of thumb:

• Small team, fewer than a handful of agents, or a list you don't know well yet: start with ratio so you stay in control.
• Larger team on a known list where you want to squeeze out idle time: predictive will usually keep more agents busy.

Either way, watch your drop rate. If it climbs under either method, our walkthrough on lowering your VICIdial drop rate covers the fixes, and the broader dialing strategies guide puts both methods in context. If you'd rather skip the setup entirely, our managed boxes ship tuned out of the gate; see pricing.