Telecom Churn Management by Rob Mattison

Customer Value Function, Market Segmentation, Churn prediction, all have starter entries, however Mattison needed to delve down into them just as he created his view of the taxonomy of churn below. Maybe that would be giving away too many of the family jewels.

... the wireless industry in the US anticipates an increase in the annual churn rate from the current 30 percent (2-3 percent per month) to 40 percent by the year 2004.
Chapter 1, Wireless churn in the US
Taxonomy of Churn:
voluntary
	deliberate
		technology 
			handsets
			features
			new technology
		economics
			per minute
			activation
			subscription fee
		quality
			coverage
			call quality
			customer service
			billing
		social/psychological
			image
			experimenting
			friends/family
		convenience
			internet
			retail channels
	incidental
		finances
		location
		major life changes
involuntary
	fraud
	non-payment
	under-utilization
Retroactive Enhancement is the process of incorporating newer and better capabilities, features, and functions into the suite of offering to consumers without upsetting the nature of the service agreements made with existing customers.
Chapter 4, Retroactive Enhancement