A business rule is a statement that defines or constrains some aspect of the business and always resolves to either true or false. Business rules are intended to assert business structure or to control or influence the behavior of the business. Business rules describe the operations, definitions and constraints that apply to an organization. Business rules can apply to people, processes, corporate behavior and computing systems in an organization, and are put in place to help the organization achieve its goals. By documenting a business rule, the business analyst can ensure that the business need can be validated against the criteria that govern the business operations and outcomes. References: PMI Professional in Business Analysis (PMI-PBA) Examination Content Outline1, page 19; Business Analysis for Practitioners: A Practice Guide2, page 97.