What is the speciality of interpersonal behavior approach in theories of management?
I think you are talking about Organizational Behavior Management. An OBM psychologist can become involved in improving/maintaining any aspect of individual or organizational performance. In general, the areas include training, performance, management, (which may include improving performance quantity, quality, customer satisfaction, and/or safety), and systems analysis (increasing the efficiency of the way in which work gets done in the organization, altering what individuals do in their jobs, developing measurement systems for various units in the organization, and assisting organizations at the top level to determine measurable goals for its overall performance).