Group development is a process of a group forming and then working together so that a goal is accomplished. The process typically involves four different steps, with another step added later: forming, storming, norming, performing, and adjourning. The process was first described by Bruce Tuckman, an educational psychologist who first came up with the process in the 1960s. Since then, these stages of group development, sometimes known as team building or team development, have become a generally-accepted pattern of group behavior.