Issue hierarchy in a project

[Martijn van Landschoot]

For a new project my team would like to work with the following issue hierarchy:

Epic
      |__ __Story 
      |               |__ Sub-task      
      |               |__ Spike
      |__ Task
                   |_____ Sub-task
                   |_____ Spike

It shouldnt be possible to make an story/task without an Epic in this project. How can I  configure/enforce this hierarchy in the project? 

[Jack Brickey · Accepted solution]

For your ‘must have an epic’ requirement you could make the Epic Link field required in the Story and Task workflow via Validator.

[Milan Chheda [INFOSYSTA]]

1. First create a new issue type called 'Spike'. It should be sub-task and not start standard.
2. Create Epics in your Projects
3. Open any epic, and click on Create issue in epic (select issue type as Story or Task)
   
   
4. Next, open the created Story/Task and click on 'Create Sub-task'. It should give you 2 issue types (Sub-task or Spike)
5. That's it! Your hierarchy is created.