Psychologist Bruce Tuckman first came up with the memorable phrase "forming, storming, norming and performing" back in 1965. He used it to describe the path to high-performance that most teams follow. Later, he added a fifth stage that he called "adjourning".
The first stage, forming, is characterized by a great deal of uncertainty about the group’s purpose, structure, and leadership. Members are testing the waters to determine what types of behaviors are acceptable. This stage is complete when members have begun to think of themselves as part of a team.
The storming stage is one of intragroup conflict. Members accept the existence of the team but resist the control that the group imposes on individuality. Further, there is conflict over who will control the team. When the storming stage is complete, there will be relatively clear leadership within the team.
The third stage is one in which close relationships develop and members begin to demonstrate cohesiveness. There is now a stronger sense of team identity and camaraderie. This norming stage is complete when the team structure solidifies and members have assimilated a common set of expectations of appropriate work behavior.
Performing is the fourth stage. The structure is fully functional and accepted by team members. Their energy is diverted from getting to know and understand each other to performing the necessary tasks.
For permanent teams, performing is the last stage of their development. For temporary teams – those who have a limited task to perform – there is an adjourning stage. In this stage the team prepares for its disbandment. A high level of task performance is no longer the members’ top priority. Instead, their attention is directed toward wrapping-up activities.
Tuckman's model explains that as the team develops maturity and ability, relationships establish, and the leader changes leadership style. Beginning with a directing style, moving through coaching, then participating, finishing delegating and almost detached.






