The Decision Model and Notation (DMN) standard allows organization to describe, model and execute business decisions; DMN also enables interchange of defined models across organizations via the standardized xml interchange format. The DMN standard provides three level of Conformance, which aims to define helpful scopes of support for Vendors providing implementations of the standard; this in turn is beneficial for organizations adopting the standard, for a responsible awareness of the level of support provided by the chosen tools and implementations. As the DMN standard receive more traction from Decision Management practitioners and increased adoption from organizations, a verifiable method for testing the level of Conformance claimed by the implementation would generally benefit all actors involved.

The DMN Technology Compatibility Kit (DMN TCK) is a community-led proposal for a verifiable and executable method to demonstrate the Conformance level of support provided by a Vendor- supplied DMN implementation. In addition, this method provides more finer-grained details on the actual support for specific DMN constructs for each implementation.

The DMN TCK working group is composed by vendors and practitioners of DMN, with the goal to assist and ensure Conformance to the specification, by defining test cases and expected results, by providing tools to run these tests and validate results; the outcome also represent an additional and pragmatical way to recognize and publicize vendor success. Joining the TCK is free, it also holds weekly conference calls and new members are always welcome.