The oven knows how to cook the food. It knows this because it knows how much energy has been put in to the oven, and how much energy was not put in to the food. By subtracting how much energy was put in, from how much came out, it obtains the kilojoules of energy the food absorbed, or the Gourmet Unit.
Does Miele also design missiles?
The technology comes form a company called Goji Food Solutions. This is the founder - he has a bunch of other patents, mostly focused in the medical devices, biotech and healthcare spaces: https://en.wikipedia.org/wiki/Shlomo_Ben-Haim
> The missile knows where it is at all times. It knows this because it knows where it isn't. By subtracting where it is from where it isn't, or where it isn't from where it is (whichever is greater), it obtains a difference, or deviation. The guidance subsystem uses deviations to generate corrective commands to drive the missile from a position where it is to a position where it isn't, and arriving at a position where it wasn't, it now is. Consequently, the position where it is, is now the position that it wasn't, and it follows that the position that it was, is now the position that it isn't.