Baking analogy at work today.
What bakers don't like to hear is: "Evaluate this and give me the ballpark figure." The problem is this is something with really vague criteria, e.g. edible. Customers just want to see a tangible figure, even though there is no basis to derive it for them. The worse thing is once the figure is quoted, you're supposed to uphold it.

Like someone just exclaimed out of exasperation today: "If you don't know what ball game you're playing, you won't know what ball park!"