Whenever work is delegated to others - the person that is responsible for those tasks being done, is the supervisor. It doesn't matter whether these individuals have the title of supervisor, foreman/woman, manager, lead hand, department head, superintendent, executive or even CEO - if they're supervising others - they're supervisors. Unfortunately, most supervisors have not received the basic training necessary to successfully carry out their role.
This book gives supervisors the survival skills they need to do things right.