Consider your key employees. You trust them. Rely on them. Give them more responsibilities. And then one day things aren’t the way they used to be. You notice that they’re leaving work a little early on most days or missing agreed-upon deadlines or getting into arguments with co-workers.
Something has changed. Although their performance has slipped and their attitude may have deteriorated, consider how you may be managing them. Have you kept pace with the way things have changed, or are you managing them the same way you did 10 years ago in a less complicated environment?
Someone’s slip in performance may be due to no longer knowing what you expect. Your expectations have changed, but you haven’t clearly communicated what is different.
In other situations, however, the person may be resisting doing the job as it has evolved. They may not have the right skill set or may not be motivated to change with the position.