This document discusses explainable artificial intelligence and decision making. It introduces Decision Model and Notation (DMN) as a way to model and automate business decisions in an explainable way. DMN uses diagrams to depict decision logic that can be both explained and executed. This allows decisions to be transparent, provable and explainable, meeting requirements like GDPR. An example is provided of using DMN to determine how to split repair costs between a rental car company and renter based on membership level, responsibility and damage type.