Segmentation for Retailers - Data Mining Techniques in CRM: Inside Customer Segmentation - page 341

Figure 8.5 Deriving the frequency component with a conditional derive node in IBM
SPSS Modeler.
of months: six months for old customers and the number of months as
registered customers (tenure) for new customers.
(c) Monthly average amount spent defined the monetary component. This
component was calculated with a formula similar to the one used for the
frequency measure.