Hello, I am a beginner in modeling and preparation of data for modeling. Currently, we prepare the data for modeling churn customers in the TELCO and I have the following problem. I churn for the period 201505 and to join these data variables for say 6-9 months before the churn rate and it will targer churn = 1. The problem is with the TARGET = 0, which here should take contracts? Is such a database only from the period 201411 and variable calculated from 201411 to 201505? (only those which do not churn)? Should I take the entire database, or for example if I examine the commercial churn (201505) to take the base of such 201411, which will EOP (End of period) in the coming months (eg 6 months)? Apologizes for probably a trivial question, but as I wrote above, I am a beginner. Thank you very much for your help, advice, suggestions on what I should pay attention to. Thanks Pete
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