Abstract: For the complexity of business and the uncertainty of user’s requirement, a user-oriented
dynamic service workflow building and instantiation method is proposed. Firstly, Service Process
Pattern constructed as knowledge description of service workflow. It abstracts and specifies the business
domain knowledge and the associated service processes. Based on the service process pattern, a
multi-granularity service organization model is built by multi-layer goal-pattern matching to realize the
business logic customization. Then, Quality of Service analyzing is made to select the proper concrete
service in order to realize the service instance customization. Finally, this method is illustrated by an
emergency treatment example.

Key words: service workflow, service process pattern, service composition, customization