I want to implement the following hierarchy as part of my company's projects:
1. Epic
2. Business story
3. Task
4. Subtasks
But want to male sure the tasks are linked to the Business stories as parent and child and the subtasks as child for the tasks; since currently the percentage of completion that shows on the level of business story is directly related to the % of completion of a subtask. I want to implement the following hierarchy business story -> task -> subtask and when I'm checking a BS to reflect the % completion of a task instead of a subtask. Is thay doable???