"I am a realist and know that in the software world, user requirements change on a very routine basis. But, if I were to notice that changes were happening in an out of line manner, I'd first look at our own internal processes to see where we can improve. If a requirement document needed updating, I would work with my engineering team to ensure that was done. Then, I would pick up the phone to speak with our customer that put through the request to get firsthand knowledge about the situation. In my experience, this is the best way in ensuring that user requirements changes are effective on the first try."