The document presents a model of business behavior that identifies the key elements and their relationships. The model shows that four fundamental requirements underlie the state of any business: 1) Capabilities in the form of capital, capacity, operations, processes and resources. 2) Direction determined by markets, propositions and experiences. 3) Position defined by demands, brands and customers. 4) Return on investment as measured by the valuation of customers against the initiating capital. The model is generic and abstract, showing commonalities across businesses rather than company-specific details.