Performace of Manual vs Progressive vs Predictive Diallers

[Tuxis]

We're making the shift from manual to predictive dial (probably via Five9). I'm trying to forecast what difference it will make to our performance. Different vendors make wildly differing claims.

One survey I have found (Types of diallers - Call Centre Helper Guides) suggests where manual dialling results in 6.5 live contacts an hour, a progressive dialler can increase this to 9.1 contacts an hour, and predictive dialler boosts that to an astonishing 16.2.

Obviously this varies according to business. To give some more background, our telemarketing team generates appointments (ie lead generation) for our investment advbisers. It is B2C and a good telemarketer will avergae about 1 appointment per hour.

What is your experience and what might we expect?