Ustomer pyramid concept definition and provide three examples in different industries

provide a brief definition of the tiering of services concept using the customer pyramid concept. Using original examples, discuss at least three distinct and separate tiering arrangements within distinct and separate sectors that you are familiar with operating within Asia.

Customer pyramid concept is developed by: Valarie A. Zeithaml, Roland T.Rust, and Katherine N.Lemon (2001),The customer pyramid: creating and serving profitable customers, California Management Review, 43(4), pp. 118-142