This chapter constitutes an extension of what was described and discussed in the previous chapters (Chapter 3, A Holistic View on Spark to Chapter 9, City Analytics on Spark). Here, we took an approach driven by data and analytical needs rather than driven by predefined projects. We also developed some predictive models to score subscribers on customer churn, on Call Center calling probabilities, and even on purchasing propensity.

In this chapter, using a real-life project of learning from telco data, we have gone through a step-by-step process of utilizing big data to serve the telco company as well as their clients, from which we processed a large amount of data on Apache Spark. We then built several models, including regression and decision tree, to predict customer churn and Call Center calls and also purchasing, with which we then developed rules for alerts and also developed scores to help the telco company and its clients. At the same time, we completed some exploratory analytics...