Forrester has identified 15 key customer analytics methods that customer insights (CI) professionals must master. CI professionals are faced with tough decisions about which combination of methods will have the biggest impact on marketing and customer experience goals. And new techniques continue to emerge as the complexity of customer data increases. This report uses Forrester's TechRadar™ methodology to identify and analyze the current and future prospects of a broad range of statistical methods and predictive analytics techniques. This is an update of a previously published report; Forrester reviews and updates it periodically for continued relevance and accuracy.