How food producers calculate "best before" date?
Why I'm asking on SL? Because I'd rather not waste food to be sustainable. And many times I'm advised (by "best before" date put on food package) to waste some food product - but it looks perfectly fine and edible to me. By knowing how food producers calculate "best before" date I'd know also if I should follow those advices or not.
I know for example that France removed this kind of information from packages this year.