Chester is an excellent employee at the local plastics plant. Unfortunately, he works under a strict and controlling supervisor who will not allow employees to veer from the work they were hired to do. Although Chester has some good ideas as to how to increase production while cutting costs, he feels that he cannot bring these ideas to his supervisor. This leaves Chester feeling frustrated and somewhat anxious. According to Albrecht's research on stress in the workplace, which variable would best describe what is causing Chester's stress at work?