In Appian, a Decision Object is used to implement business rules in a structured, rule-based format. It allows you to evaluate multiple conditions and return a result automatically, similar to a decision table.

Think of it as a table of conditions → outcomes, which helps manage complex logic without writing large expressions.

Each column in the decision table is either an input to the decision or one of its outputs. Each row in the table represents a decision rule, in which each cell is a logical operation. When all the cells' conditions for a particular row are true, the decision will return the output values specified for that row.

For example, to determine the legal drinking age:

A decision object in Appian can capture the rules of decision table in an equally readable format: