Good managers do these things effectively and efficiently" (Bateman & Snell, 2004). The management style is simply assigning tasks and then receiving the results. Management then gets its authority through when the position in the company or organization is assigned, Van Wart states (as cited in Zaleznik, 1977; Bennis and Nanus, 1985: Kotter, 1990, “…leadership is about producing change and movement and therefore focuses on vision, strategy and aligning people, and inspiring, and that management is about order and coherence, and therefore emphasizes planning , organization, control, staffing, and budgeting” (p.32), as John M. Bryson explains, “Leaders should be especially alert to the possibilities for quite dramatic strategic change. Pressures come from the political context,… from the economic context,… from the technological context… or from the context ecological” (kindle file). Like Sherri Hartzell.