The article describes an example of using the decision support method in the development of multiservice architecture information systems for a web service. The method is based on a hybrid approach, which consists in the joint use of structural analysis and an object-oriented approach. For domain description stage the method are used IDEF0 and DFD busines process notation. On the software design stage DFD diagram are converted in artefact and elements of classes diagram, use cases diagram and sequences diagram. This approach are procuring the correction of both stages. It allows you to describe autonomous and automated components of software systems, as well as web services as software agents. Interaction with the agent is carried out using API methods. These methods can be shown on a UML sequence diagram describing the operation of a microservice agent. The information for constructing diagrams of the object-oriented approach is taken from the description of diagrams of the structural approach. To test the method, a prototype of the web service BPsim was developed. The main functions of the BPsim. Web service is the construction of hybrid agent-based simulation discrete-event models and conducting simulation experiments with models of business processes and organizational and technical systems, analysis of the results of simulation experiments.