---
title: DMN (Decision Model and Notation)
type: framework
tags: [bpm, decisions, rules, notation, standard]
sources: ["[[sources/2018-dumas-fundamentals-of-bpm]]"]
created: 2026-04-13
updated: 2026-04-13
---

# DMN — Decision Model and Notation

OMG standard for modelling decision logic, especially for invocation from within [[frameworks/bpmn]] processes. Introduced in [[sources/2018-dumas-fundamentals-of-bpm]] (§4.4, §10.5.8).

## Two levels
- **DRD** — Decision Requirements Diagram; decisions, input data, knowledge sources, business knowledge models.
- **Decision Logic** — typically expressed as **decision tables** with hit policies (unique, priority, first, collect, rule order, output order).

## Typical use
- Credit scoring rules
- Eligibility checks
- Routing / discount logic

## Executable integration
A BPMN business-rule task invokes a DMN decision; the decision table returns an output that drives subsequent gateway routing. Both BPMN and DMN are **operational-frame** notations per the APM terminology.

## Related
[[frameworks/bpmn]] · [[frameworks/cmmn]] · [[concepts/framed-autonomy]]