I have used the GSBPM in several different contexts, mostly related to managing quality. I have found the model to be very useful and easily understood. That said, there is always room for improvement. Below is my humble feedback.
• At step 6.4 we apply disclosure control; however at no point in the model did we ever design the disclosure control methodology. I suggest including “disclosure control” in the list provided in the description for step 2.5.