What do you consider the key ones to be in your centre?
We hear of a great feedback process at Dell. Following a technical problem resolution call, the agent asked if the call could be transferred to his supervisor for personal feedback. This was duly done, so a great feedback loop.
The cynic might say, would this have been done had the resolution not been so successful! However, internal monitoring should surely identify the percentage of contacts where feedback was offered and accepted.
Have you come across this before? If so where?