I agree with the previous two comments, things like that I didn’t have any knowledge about until this course, it is very important in cases like this to understand which type of change must occur and how that will affect the entire project. As bb254 mentioned, going back to the planning phase will be a necessity and that will put everything else into change regarding the failed part of the device. It is necessary to know the consequences of a simple change in the DDP and how it will affect the entire device cycle.