In most (large) corporations there are several levels of management. Strategic management is the highest of these levels in the sense that it is the broadest - applying to all parts of the firm - while also incorporating the longest time horizon. It gives direction to corporate values, corporate culture, corporate goals, and corporate missions. Under this broad corporate strategy there are typically business-level competitive strategies and functional unit strategies.

• Corporate strategy refers to the overarching strategy of the diversified firm. Such a corporate strategy answers the questions of "in which businesses should we be in?" and "how does being in these business create synergy and/or add to the competitive advantage of the corporation as a whole?"

• Business strategy refers to the aggregated strategies of single business firm or a strategic business unit (SBU) in a diversified corporation. According to Michael Porter, a firm must formulate a business strategy that incorporates either cost leadership, differentiation or focus in order to achieve a sustainable competitive advantage and long-term success in its chosen arenas or industries.

• Functional strategies include marketing strategies, new product development strategies, human resource strategies, financial strategies, legal strategies, supply-chain strategies, and information technology management strategies. The emphasis is on short and medium term plans and is limited to the domain of each department’s functional responsibility. Each functional department attempts to do its part in meeting overall corporate objectives, and hence to some extent their strategies are derived from broader corporate strategies.

Many companies feel that a functional organizational structure is not an efficient way to organize activities so they have reengineered according to processes or SBUs. A strategic business unit is a semi-autonomous unit that is usually responsible for its own budgeting, new product decisions, hiring decisions, and price setting. An SBU is treated as an internal profit centre by corporate headquarters.

An additional level of strategy called operational strategy was encouraged by Peter Drucker in his theory of management by objectives (MBO). It is very narrow in focus and deals with day-to-day operational activities such as scheduling criteria. It must operate within a budget but is not at liberty to adjust or create that budget. Operational level strategies are informed by business level strategies which, in turn, are informed by corporate level strategies.

Since the turn of the millennium, some firms have reverted to a simpler strategic structure driven by advances in information technology. It is felt that knowledge management systems should be used to share information and create common goals. Strategic divisions are thought to hamper this process.