File:Two-barriers.png

Summary
The two-barriers model of team effectiveness was developed, which challenged the accepted Tuckman model of team development. Tudor Rickards and co-workers suggest a modification to this theory, which they labelled the two-barriers model of team effectiveness. It was initially sketched out in Handbook for Creative Team Leaders. The model proposes two barriers to team effectiveness. The first barrier is claimed to restrict development of the poorest teams at the storm stage of team development. The second barrier, at the norm stage of team development, inhibits a further proportion of teams. Only by breaking out of the accepted norms is a team able to establish new ‘creative’ norms.