An often repeated charge against DMN is that it makes iteration - a key feature of real-world decision logic - too difficult for business users. "It's programming!" they wail. "Business users can never understand this!" But actually, it's not so hard. To iterate a decision in DMN you must start with a list. Iteration simply means performing some bit of decision logic on each item in the list. For example, if you are a bank classifying assets for regulatory compliance, you iterate the classification decision over each asset in the list.