The programs designed specifically to run business rules are called rule engines.

However, business rules need not only be regarded as constraints.

They test to see if data, maybe across multiple tables, follow specific business rules.

If I change it once in one place only then automatically every program on the network is using the new version of the business rule.

Another business rule is to avoid using local women.

For example a business rule might state that no credit check is to be performed on return customers.

However it is a fairly common practice for organizations to gather business rules.

In this case the collecting of the business rules is incidental.

The very definition of a term is itself a business rule that describes how people think and talk about things.

To say that a customer can place an order is not a business rule, but a fact.