The document introduces the Delta Model, a new strategy framework that places the customer at the center of management. It examines three primary options to establish customer bonding: Best Product, Total Customer Solutions, and System Lock-In. Best Product focuses on product economics through differentiation or low cost. Total Customer Solutions provides customized solutions and seeks cooperation. System Lock-In aims for market dominance through network effects. The Delta Model complements Porter's framework and the Resource-Based View by adding the missing customer perspective to strategic thinking.