Managing people you don’t manage
What are your tips for managing staff who you don’t directly manage? I have a manager (one of my direct reports) who has a member of staff who is not performing, I have provided advice and guidance to this manager on how to manage the staff member and what to do (using the manager tools guidance), however this staff member is having an effect on other staff and is slowing us down. I don’t want to shoot in over the top and sort it out as this would undermine the manager; however it’s now becoming frustrating for me and de-motiving for others. What advice would you give?