A Business Rules Engine (BRE) is a software system that automates decision-making processes by applying predefined rules to data. It allows organizations to define, manage, and execute business rules without needing to alter the underlying application code. This flexibility helps businesses adapt quickly to changing regulations or market conditions. By using a BRE, companies can improve efficiency and consistency in their operations. For example, a BRE can be used in areas like insurance claims processing or banking compliance, where rules must be applied consistently to ensure accurate outcomes and reduce human error.