GRPI presents a structured approach to team dynamics. The GRPI model has four elements: goals, roles, process, and interpersonal relationships. Goals give the team direction. Roles define who is responsible for what. Process allows for communication, constructive ways of dealing with conflict, and group decision making. Interpersonal relationships involve caring about the other team members as people, keeping commitments, and developing mutual trust.
Source: Quixote Consulting (2011). GRP Model: An Introduction to the GRPI Tool. Retrieved from http://quixoteconsulting.com/News_articles/Topics/grpi.html