Dynamic relationship between score & parts

I have not found this feature so assuming it doesn't currently exist, here goes.

Once a score is written and the parts produced and saved, I often find that in the real world, certain parts need changing (or I have just written something stupid!) Currently I have to change the score (fair enough) and then go into every part to make the changes there as well. It would be a massive time saver if they could be dynamically linked. ie I make the change in the score and the changes happen automatically in the relevant part.