This document discusses Larry Greiner's model of organizational growth which identifies 5 phases of evolution that organizations progress through as they grow in size and age. Each phase is characterized by a different management style and is followed by a period of revolution or crisis as the previous management style is no longer effective. The 5 phases are creativity, direction, delegation, coordination, and collaboration. The document provides an example of how Costco grew through the collaboration phase and suggests applying Greiner's model to analyze where one's own organization currently sits in the phases and what management changes may be needed to address the next potential crisis.