You grit your teeth and chew on it, until those times you know you're right. You then keep escalating to Director level if need be. Though nowadays there's so m

You grit your teeth and chew on it, until those times you know you're right. You then keep escalating to Director level if need be. Though nowadays there's so many leaders (chefs), you just play them against eachother and bring some popcorn. The trick is to NEVER grumble about uncertain stuff, but ONLY suggest stuff that should work. 4-5 years later, they'll implement it with no mention of you, but you will have been "heard".