Team members know each other well and each other’s strengths, roles and personalities. Katzenbach describes high performing teams as made up of a small number of people with complementary skills. If team members know each other well, they are in a good position to operate in a “spider’s web” manner rather than “hub and spoke”. The “spider’s web” is a real team (Hackman, Katzenbach) whereas the “hub and spoke” is a single leader working group. Hackman also says that real teams need clear boundaries, specified authority and membership stability.