If the dates for one story change (when the issue is either changed duration or scope) then the change has to propagate to other stories linked to it. For example if story 1 is linked to story 2 and story 2 comes after story 1 ie a block relation, how do I make the start date for Story 2 change if I change the due date for story 1 because story 2 has to start 1 day post completion of story 1. In PM terms a FS or a FS + 1 relation