Decision Table Lookups

A decision table is a data structure that captures business rules as data rather than code. Each row represents a combination of conditions and the resulting action. Decision tables make complex rules explicit, easy to modify, and simple to test. This approach separates the rules themselves from the logic that applies them, enabling non-programmers to review and validate the business logic. This pattern is essential when business logic changes frequently. Instead of modifying if-elif chains (and risking bugs), you update the decision table. Non-programmers can even review and validate the rules. Basic Decision Table Define rules as a list of tuples or dictionaries containing conditions and outcomes. The table is checked top to bottom, and the first matching rule wins. This makes rule prior