Deal with under-performance fairly
When there is a problem with under-performance in your team you need to address the issue with the person concerned. If you have noticed it there is a high chance that the rest of the team have noticed it and could even being affected by the under-performance on a day to day basis.
You need to show you are working with the individual compassionately to help them grow and develop but there does come a time when you need to take action to move them into a more suitable role either inside or outside your organisation.
If your team see you dealing with under-performance fairly then you are likely to get understanding from the team even if they may feel uncomfortable.
Team dynamics cannot be maintained if an under-performer or even a very negative team member is constantly dragging it down. If you are listening to your team, they will tell you in their own way when someone is not fitting in with the team or a problem may be brewing.
The earlier you can understand the issue and offer support to the individual the better.
Further reading on this topic can be found at: