As mentioned earlier, rules are an elementary part of business processes within a company. So, the challenge is to identify the rules, separate them from the business flow logic, and organize them as services in an SOA-based style to ensure consistency and business agility. This approach sounds easy, but it isn't, as we will see in the following paragraphs.
Identifying potential candidates for business rules within a business process seems quite simple because potential indicators for decision points are expressed as control structures, such as gateways in a BPMN 2.0 process or if activities in a BPEL 2.0 process. Other potential rule candidates might be found at code locations where decision preparations or complex calculation rules are implemented. However, these are only a few possibilities; in the real world, business rules are omnipresent. The use of the designation rule candidate is conscious since not all identified locations...