We have JIRA issue hierarchy based on custom field called “EPIC level”. In EPIC issue type, using this custom field will differentiate the issues as “Journeys,Improvement,Features” and use link type as “is epic of” & “is feature of”. It looks like below
-->Journey [Issutype=EPIC and epic level = Journey] (linktype) | has epics -->Improvement [Issutype=EPIC and epic level = Improvement (linktype)| has features -->Feature [Issutype=EPIC and epic level = Feature] --> Stories -->Sub-Tasks
Along with this, need to define program increment timelines and display the features in the timeline. Please help.