We are looking to implement JIRA and Greenhopper. I have read numerous threads about how Greenhopper will not allow a sub-task to be assigned to a different sprint than the parent story.
Here's my dilemma - In order to fully estimate the story, a research task must be completed to identify the cause and come up with recommended solutions.
Our current Agile tool allows for tasks to be created, planned and worked but unfortunately there is no linking between the sub-tasks and the story.
How would you recommend we use JIRA / Greenhopper for this workflow? Converting the story to an EPIC and the tasks to stories doesn't look to solve the issue either as we are looking to use EPICs for maintenance releases, funded projects, etc.