Moving the people or the work?

Organizations that embrace the Agile principles apply the ground rule that teams should be stable. When you see teams as autonomous units of multidisciplinary professionals who are trained to do their jobs as effectively as possible, it makes sense not to disturb the team composition. It takes time to grow an effective team with the right culture, where members complement each other, where they feel safe and at home, and where they can excel.

Psychologist Bruce Tuckman described the different stages of group development. All of them are necessary and inevitable for a team to grow, face up to challenges, tackle problems, find solutions, plan work and be predictable in their output. When team members are regrouped, they need to go through these stages again, resulting in delay and reduction of output. This is another argument for keeping teams stable.