Why Project Team Composition Changes Affect Performance
When a member leaves the project or is added mid-project to the team, that team’s composition changes. Consequently, the team performance increases or decreases. If the team performs worse after the change, the project manager must find a solution. The first step is understanding why changing team composition affects performance.
Sometimes, the team performs worse because the new team members are not skilled or experienced enough. But when they are, the team should perform better; however, that does not always happen. Even adding experienced and skilled members can decrease team performance, at least initially.
Team Development Stages
Team underperformance is likely to be caused by a mix of factors, unique to each team. One of the main causes is the alteration of group dynamics after a member enters or leaves the team. A modified team acts as a newly formed team. To understand group dynamics, Bruce Tuckman (1965) proposed four stages of team development: forming, storming, norming, and performing.
- Forming – Individuals start to form the group; individuals avoid conflicts because they want to gain group acceptance.
- Storming – Individuals start competing, and conflicts arise because individuals define their roles and establish the group’s hierarchy.
- Norming – The group is focused on problem solving and respecting procedures; individuals trust each other.
- Performing – The group performs well as a team. (Not all teams reach this stage.)
Being a diligent project manager is a quality, just like being detail-oriented is an advantage in most professions. Over-diligence, just like perfectionism, is desirable in some situations, while in all others over-diligence becomes an obstacle in the way of