Decision Model Notation
Decision Model Notation (DMN) is a standardized modeling language for business decisions, developed by the Object Management Group (OMG). It provides a visual notation to define, model, and execute decision logic, separating business rules from application code. DMN is often used alongside Business Process Model and Notation (BPMN) to model decision points within business processes.
Developers should learn DMN when building systems that require complex, rule-based decision-making, such as in financial services, insurance, or compliance applications. It enables clear communication between business analysts and technical teams, reduces errors in decision logic, and supports automated execution through DMN engines like Camunda or Drools. Use cases include loan approval systems, pricing calculations, and regulatory compliance checks.