In the current enterprise systems, with the relationships between people and organizations based on computational applications through the Web, the need of changes in these applications happens in periods shorter and shorter. In this context, this paper proposes a model that can capture business changes and quickly implement them into computational systems. The model includes an approach for fast development of services considering that the volatile portions of business logic can be externalized as business rules and the stable portions as Web Services. It is presented a business rules and ontology integrated development environment (IDE) as part of this model, where business rules’ facts and conditions are linked to Web services.