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Business decisions are important, but are often hidden in process flows and process activities. Separating decisions from the process simplifies the process model. The new DMN (Decision Model and Notation) standard emphasizes the importance of business decisions, and also offers a standard notation and expression for decision requirements and decision logic. Decision logic modeling can take many forms, depending on the decision at hand, but decision tables are an important element. Decision tables have always been known for their ability to offer a compact, readable and manageable representation of decision logic. But many do not realize how the decision table concept has been refined throughout the years into a strict and powerful modeling technique (based on consistency by construction, normalization, completeness, correctness, …).