Issue relations help managers and teams to get a clear picture of how a particular task or issue affects other tasks and the ultimate outcome of the project. If a task that precedes 10 other tasks has to be delayed, then all related tasks need to be delayed as well, having a possible impact on the project's delivery date. If a task breakdown structure of a project is properly done, then all task relations can be entered in Redmine, and the impact on one task can be easily and quickly measured. Luckily, Redmine has issue relation features built in, which automate modification of start/end dates among related issues. This recipe is going to teach you how to set relations and modify start-end dates automatically.