This document discusses various customer-based value metrics used to evaluate customer relationships and profitability. It describes popular metrics like RFM (recency, frequency, monetary), share-of-wallet, and lifetime value. It also explains strategic metrics like customer equity and transition matrices. Methods for calculating these metrics from customer data are provided, along with examples and limitations. Specifically, it outlines two methods for using RFM scores to segment customers - sorting into cells or using regression weights - and how firms can identify the most profitable customer segments.