To better customer experience BAN all out bound call centers. Your brand experience is getting diluted by mindless calls.
I know some reputed brands having lousy call center policy which irritates. Irritates recipient of your calls. Outbound call centers irritates more than it can sell.
Sometimes irrelevant things not given attention drowns the entire experience. Don’t leave anything to chance and out of your customer experience design spectrum.
Bottom line : Your customer experience is as good as your weakest link in the chain/touch-points.