Back in 1965, Bruce Tuckman analyzed team development and came up with the following concept – which you might have seen before:

All of us are going through these stages constantly – and as the team dynamic changes, we cycle back through them.  I can assure you that I get frustrated and impatient with the early stages, as I want to “Perform.”  It’s a reminder to all of us that with change – especially leadership change – we will have to re-form as a team and move through the stages again.