A system for determining lack of compliance of a transactional entity with an enterprise policy by maintaining an historical record of the entity as changes are made over time. The system allows establishment, codification, and maintenance of enterprise policies, monitors electronic transactions of the enterprise from various data sources, detects exceptions to established policies, reports exceptions to authorized users such as managers and auditors, and/or provides a case management system for tracking exceptions and their underlying transactions. A master data extractor establishes an initial instance of a transactional entity in a monitoring database. A changed data extractor is responsive to changed data for establishing a subsequent instance of the transactional entity in the monitoring database. A transaction analysis engine applies predetermined policy rules to data in the monitoring database to determine lack of compliance of the initial and subsequent instances of the transactional entity with enterprise policies.