| I've worked in one... My God, what an experience! One thing to measure is the 'abandonment rate.' That's the rate at which callers put the phone down because they aren't getting replies from call centre staff.
Exactly how long does it take before a caller hangs up? You would need to define what counts as 'abandonment'... In practice, some people will hang on for 2-4 minutes, so if you were working in a call centre you would want staff to end their calls as quickly as possible.
That's a rough guide and obviously has 0 to do with software... We used a bespoke system for these things, and call centres are a bit like information factories.
__________________ I am always doing that which I can not do, in order that I may learn how to do it. - Pablo Picasso |