1. A method for processing instances of business rules, comprising: providing a business rule; parsing the business rule to extract entities used as rule parts; creating a hierarchical entity buffer indicating the entities used as the rule parts and identifying instances of each of the entities and real data corresponding to each of the identified instances of the entities; and creating a step result table indicating instances of the business rule and information identifying the real data in the hierarchical entity buffer used by each of the instances of the business rule.