Is that some code word for hygiene? I seem to remember that the concept of hygiene for making achaar (and for other kitchen matters) was codified in religious practices in my family/community.
But, the process, and I mean, like an industrial quality detailed process of pages and pages of notes and quantities, etc would be absolutely same.
My GM always said 2 & 3 dont have the 'hand' for a pickle.
Fun Memory : One of my grandmother most precious possessions was not gold or money, but a 40 year old aluminum tumbler, passed on to her by her mother-in-law, that was used to measure items for the pickle (x tumblers of mustard powder, Y tumblers of chilli powder..)
Hygiene matters but only incidentally, since it’s easier to keep one’s work area clean when they are clean.