When work keeps coming back to you.
You can delegate tasks without truly being able to let go of the work.
You can divide up tasks. But when colleagues keep coming to you, or the same experienced colleague, for the status, an exception or the next step, the work still ends up with a small number of people.
Not every manual step is a problem. But when customers are left waiting, errors keep returning, or work can only move forward when the right person is available, it is time to rethink how the work is set up.