Chapter 7 Building a Process Service Diagram

Process Service Diagram Basics

PowerDesigner process service diagram

The Process Service Diagram (PSD) is part of a Business Process Model. It is one of the available diagrams in a BPM. It shows the symbols of services using service provider objects and their links to each other using extended dependencies without taking into account implementation considerations.

You can also display in the service provider symbol the service interfaces it contains and their operations

The PSD can be created in a model, a package, but not within a decomposed process.

This diagram is only available when the process language or extended model definition attached to the model does not exclude the Service Provider metaclass from the model. Therefore you cannot create a process service diagram in a BPM, which uses the Analysis or EbXML process language; these languages exclude that metaclass.

For more information, see the "Excluding a metaclass from a model" section in the "Managing Profiles" chapter, in the Advanced User Documentation.

For more information about diagrams of the BPM, see section What is a BPM?, in chapter Getting Started with the Business Process Model.

For more information about decomposed processes, see section Decomposed processes and sub-processes, in chapter Building an Analysis Business process model.

Why Build a process service diagram?

The PSD allows you have a graphical and global view of the services contained in your system.

At the analytical level of your system, the PSD can be useful to specify services in a logical way and show dependencies between them with no implementation consideration.

At the orchestration level of your system, the PSD allows you to view imported services. Indeed, you can drag the retrieved service providers from the Browser and drop them in the process service diagram window. You can then design their dependencies.

For more information about the different levels of business process modeling provided by the PowerDesigner Business Process Model, see the Getting Started with the Business Process Model.