when it comes to addressing relatively serious issues, or matters of corrective action in which a leader is wondering whether a member of the team might not be worthy to be on the team anymore, then everything changes. These are best handled privately, in a one-on-one situation, to respect the dignity of the person being held accountable. However, and this can be dicey, the leader is often well advised to let her people know that she is addressing the situation to avoid unproductive and dangerous speculation.
