IBM Operational Decision Manager (ODM) is a Decision Management tool that is used for maintaining business decisions by Fortune 500 companies across various business domains. ODM enables business users to create, update, modify, and delete business rules. ODM provides three different types of rule artifacts: BAL rule, decision table, and decision tree. The decision table is the most highly used rule artifact. This article discusses the need for the decision table artifact, how it works, the different properties and features, and the best practices surrounding it.