How to set up kitchen display system routing for a restaurant

I learned to be careful with KDS routing after a menu update made one Friday dinner worse instead of faster. We added new combos in the POS, but nobody checked which station received each modifier. Grill saw the entree, pantry saw the salad, but expo never saw the sauce note. Servers kept walking back to ask, cooks blamed the screen, and the guest only saw a slow plate. Now I test routing before …