Mayo theorized that management workers at the Hawthorne Western Electric plant were motivated more by Mayo theorized that management workers at the Hawthorne Western Electric plant were motivated more by a sense of individual accomplishment than by management's approval individual bonuses than by environmental factors social dynamics than by economic or environmental factorsMintzberg classified management decision roles into four types. These include Mintzberg classified management decision roles into four types. These include resource allocator, disturbance handler, and negotiator entrepreneur, employee selector, and negotiator entrepreneur, controller, and negotiator