Your reporting environment should not be static; it should continue growing and evolving. Those changes should come under one of three categories. Whenever you look at the changes coming to you, classify them as Comply, Sustain or Improve. You must make compliance changes, which must be the highest priority. Next comes Sustainability, which is about ensuring that what you have now keeps working. That should be simple, but as your model evolves, you must consider and ensure those new improvements or compliance changes do not break anything. Lastly, you have Improvements; these must always be your lowest priority, although these will often get the most attention.