A Decision Service automates a discrete decision-making task. It is implemented as a set of business rules and exposed as a web service (or Java component or .NET library). By definition, the rules within a Decision Service are complete and unambiguous; for a given set of inputs, the Decision Service addresses every logical possibility uniquely, ensuring decision integrity.
A Ruleflow is built in Corticon Studio. Once deployed to the Corticon Server for .NET, it becomes a Decision Service.