We have a complex multilevel issue structure.
Now it works on linked issues (we use link type "Is parent task of/is subtask of")
It give us opportunity to make a lot of levels (as much as needs)
+ issue of any type can be at the any level
but there is one significant drawback - any issue can have more than one parent.
Is there any way to build complex multilevel structure without binding to issue type and number of levels ?