We found out that UI components come with inherent constraints, which limits the success of the matching algorithm and the provision of suitable UI components for a Web service operation. This relies on the fixed structure of the functional interfaces and Web services with a huge amount of parameters. The strength relies in same domains, because of the usage of similar parameters and already existing UI components that can be bind to preselected Web service operations. However, the development of user interfaces for service-based applications benefits from the matching algorithm, which provides suggestions of UI components to apply them to Web service operations.