Issue types and workflows have a many-to-one relationship. This means each issue type can be associated with one and only one workflow. One workflow can be associated with multiple issue types. This rule is applied on a per-workflow scheme basis, so you can have a different association of the same issue type in a different workflow scheme.

When you add a new association, Jira will list all the issue types and all available workflows. Once you have assigned a workflow to the issue type, it will not appear in the list again until you remove the original association.

Among the list of issue types, there is an option called All Unassigned Issue Types. This option acts as a catch-all option for issue types that do not have an explicit association. This is a very handy feature if all issue types in your project are to have the same workflow; instead of mapping them out manually one by one, you can simply assign the workflow to all with this option. This option is also important as new issue types are added and assigned to a project; they will automatically be assigned to the catch-all workflow. If you do not have an All Unassigned Issue Types association, new or unassigned issue types will be assigned to use the default basic jira workflow. As with normal issue types, you can have only one catch-all association.

There are two ways to assign a workflow to an issue type. If you want to add an issue type to one of the existing associations, perform the following steps:

1. Browse to the workflow scheme's details page for the workflow scheme you want to configure by clicking on its Edit link
2. Click on the Assign link for the association you want to add an issue type to
3. Select the issue types to add from the Assign Issue Type to Workflow dialog
4. Click on the Finish button

If you want to create a new association from scratch, perform the following:

1. Browse to the workflow scheme's details page for the workflow scheme you want to configure.
2. Select the Add Existing option from the Add Workflow menu. This will bring up the Add Existing Workflow dialog:

3. Select the workflow to use and click on the Next button.

4. Select the issue types to associate with the workflow and click on the Finish button. If you select an issue type that is already assigned, it will be removed from the old assignment and added to the currently selected workflow: