I am currently doing a customer segmentation project in SAS.
I have identified 2700 customers who are have made a purchase in each of the 4 years I am analysing. For the cluster analysis the more purchases/customer each year the better the data quality is. However as I become more selective over number of purchases needed each year per customer, the less customers can be considered in the cluster analysis.
How should I go about choosing the cutoff point for the number of purchases necessary per customer per year to be considered for analysis. I am struggling with this trade off between data quality and having enough customers for analysis.
Thanks a lot! :)