Issue type schemes are templates or collections of issue types that can be applied to projects. As shown in the following screenshot, JIRA comes with Default Issue Type Scheme, which is applied to all projects that do not have specific issue type schemes applied. When you create a new project, a new issue type scheme is created for you based on the project template you have selected. The new scheme will also have issue types prepopulated based on the template. As we can see in the following screenshot, we have two issue type schemes, TP: Project Management Issue Type Scheme for Test Project and SD: Software Development Issue Type Scheme for the Software Development project:
When you create your own issue types, in order to make them available, you need to add them to the issue type scheme used by your project.
