RFM and Gap analysis

Hi there,

I'm doing some RFM (recency, frequency, monetary) and gap (lapsed period) analysis on constituent segments in the database and wondering if anyone has done the same. I'm especially interested in gap analysis as I'd like to look at number and length of lapse periods (years off) during a customers time with us. Currently looking at ticket buying behaviour but will use it on donations once I've worked out the kinks.

Cheers

H