Call Center Agents

What are acceptable performance standards for a call center that responds to telephone calls, email, and voice mail?

I need to know what standards I should set for a small in-bound department, where the length of call is not perceived as that much of an issue, and we also have these other tasks (email and VM). Should calls be restricted to some specific length?

Number of seats for call center

My call cnter is small,4-seates, what is a reasonable to handle a mobile customer base of 400,000 customers.

Training Plan for Call Centers

Can someone give me the standards for training new CSRs, ongoing training, re-training for CSRs with complaints? I am looking for time spent training, monitoring, how often for refresher courses, process for retraining those who receive complaints from customers?

benefits

what are the benefits of call center agents and who will benefit from them?

How do you strike a balance between frustrated users and frustrated call center agents?

Our company are currently busy with various Customer Centricity Projects. From a People Adaptation point of view - whilst these projects are yet to roll-out - how does one strike a balance between frustrated customers versus frustrated call center agents?

What is a realistic number of calls that a single phone agent?

What is a realistic number of calls that a phone agent handling calls for a busy multi-specialty physician's practice can handle? Thanks very much.