The DAX instance structure and code release methodology is more important that ever with the introduction of DAX 2012. More important it is the key, as it has been in reality in older version, if you want a stable environment.
With the introduction of DAX 2012 the need to enforce the process has become critical to ensure you have a stable production environment and a reliable code release process, and the ability to move your production data to other environments for testing and evaluation.
DAXNigel 