Abstract: Systems and methods for developing business rules for decision engines are provided. A user interface may be provided for inputting business rules and one or more sets of data. The business rules may be in a format of a decision table and/or a decision matrix. The business rules may be applied on the sets of data to generate rule feedback, using an internal decision engine, which denotes coverage of the data by the business rules. The rule feedback may be provided on the user interface, such as with a data coverage indicator utilizing colors, and/or data coverage statistics. The business rules may be defined and validated prior to implementation in an external decision engine. Importable business rules that are adapted to be executed by the external decision engine may be generated based on the business rules. Components of the system may be executed locally on a personal computer.