Business rules engine software is a technical tool used to reduce the complexity of making decisions. It helps organizations by providing a platform to express their policies in an automated, consistent, and precise manner. By ensuring that all employees adhere to the same set of rules, organizations can make much more efficient, accurate, and repeatable decisions. Business rules engine software works by automating the evaluation of business logic against data inputs to determine which action should take place next. This helps improve process accuracy and consistency, thus leading to improved organizational efficiency.