The present invention provides a business process execution method, a business process engine, a method for deploying a business process engine and a computer program product. According to one aspect of the invention, there is provided a business process execution method, wherein, the business process is predefined by using Business Process Specification Language, said method comprising: performing said business process and monitoring events generated during the execution of said business process; and jumping from one step of said business process to another step based on a preset jumping rule, thereby changing predefined process of said business process.