I read relevant information about maximizing lifetime value is essential with rfm analysis https://www.owox.com/blog/use-cases/rfm-analysis/ With it, you are able to encourage customers to spend as often as possible over each different visit. Recency, frequency, and monetary value are key parts of figuring out how to maximize that value.
Problem statement is actually used to elaborate the actual problem. It is based on the discussions conducted with the customers or the parties involved in the project. This is very important part of the system analysis because if the problem statement is considered in a wrong manner then whole project can be failure.