You can categorize projects into Project Types. You control the actions that your project can perform by selecting the appropriate Project Type. Before you start a new project, you must first select a Project Type. Let your business requirements and the required user interactions determine the Project Type that you select. For example, you can use the Forms (Web) project to produce web forms for single user interaction. You can use the Workflow project to produce the forms that require multiple party interactions to accomplish a task.
Each Project Type has the components that are specific to the project's intended functionality; therefore, not all components are available in every Project Type. For example, you can only access Workflow components from within a Workflow project.
After you select a Project Type and begin creating your project, you cannot change the Project Type. If the Project Type ends up not fitting your needs, you must select a different one and begin again. You may be able to export some of the components from your current project into your new project. However, some components are specific to a Project Type. For example, you can use forms components in the Forms (Web) projects, but you cannot use form components in the Decision Only projects.
Project Types can be tied together using features within Workflow Designer. However, you should choose each project according to how you use it in your business.