The GRPI model was developed by the Gallup Organization in 2005 and is a comprehensive team development model. It is based on the premise that teams are composed of five types of people: This model has been used by many organizations to understand the strengths, weaknesses, and risks of their teams. The model also provides guidance on how to improve team performance. The GRPI Model of Team Development provides a framework for understanding how people work together as a group. It can be applied to any type of business or organization and can be used to identify opportunities for improvement or growth in any given situation.