Processes for Trello allows you to handle complex, reoccurring processes in a consistent way by defining process template like “employee onboarding”, which you later can attach to repeating tasks (like, in this example, on every new employee hire).
By design, templates are flexible enough to support deviations or improvements on the fly. If after attaching a template to a card, or even during execution, you feel a need to adapt a process, you are absolutely free to do so by adapting the process on the parent card.
Automatically recurring processes, like weekly or monthly reports, etc., are an interesting extension to this idea, which we are currently looking into and which we may include in future releases. However, as of today, they are not supported by the Power-Up.