Team performance over the five stages is variable. This is illustrated in the following graph:

As you can see, a marked performance increase takes place in the Norming phase where most of the issues are resolved and the teams comes to terms with itself.

While going through these stages, there are several individual desires, group behaviours and issues that must be address at each stage. The following table illustrates these issues (source: Richard Weber and Bruce Tuckman 1980):