Calling it 'food management' is incorrect, because there is a very specific, delicate process and use. Michael has made up his own definition of it, and his own process that can seriously harm an animal's well being.
No, it's not incorrect and this is where you and I principally disagree I think. You are, as Wolf are reffering to weight management and also mostly about food deprivation.
It's simple, to me, food management means what I've written in my above posts, things you mostly agree with I think if you are willing to accept that semantics have a very important role to play here. I know Michael agrees with this as well, he does not use food management solely for the purpose of motivation, but as a part of a complete approach to parrot keeping.
It does not matter that you state that in academical terms weight management means what your quote says above. Semantics means the meaning of words, and to most people, Avian Vets and Zooligists and Biologists excluded - food management should mean what I've written: to manage food.
The definition from The International Association of Avian Trainers and Educators about weight management is in my personal opinion flawed, and seen from a very narrow point of view - as is Barbara's article.
For the sake of discussion can we agree on this:
Food management: A complete approach where you use it to maintain a healthy diet and make sure your parrot is kept at a good weight.
Weight management: We can use your definition from the AoATaE here if you want, which makes this very similar to food deprivation imo though.
Now I need to sleep, Im going fishing!