Changing a module is not always trivial. Where I work it involves creating a document requesting permission for a change, a process which normally takes a week or two. Of course there are emergency requests you can process without outside discussion, to handle things that break at 2 am, but the discussion of why it was needed simply follows the change rather than precedes it. Then you have to unlock the source project, check out the file, change it, check it in, and distribute the changes to the production file system.