Modifying the workflow
Configuring the workflow is one of the most complicated tasks in Redmine. Also, proper configuration of issue status transitions is more significant and important than configuration of fields permissions. So before doing this, I would recommend that you draw a diagram of issue status transitions that you plan to implement, and discuss it with your team in detail. In this way, you will minimize the risk of the need to modify the workflow later. However, I believe that you can't fully avoid further modifications, as the workflow should be an adaptive system and can still change.
Modifying the workflow is not so complicated as risky. A wrong configuration can allow more than users need, or limit them when they need more. You have already seen all the configuration forms and the amount of elements in them, so you would probably agree that it's easy to miss something when you add a new role, tracker, or issue status. Therefore, under this section, we will talk about basic...