I disagree with “don’t estimate” part. If it’s hard, it doesn’t mean it’s wasted effort. And it’s very valuable to business to know with higher degree of precis

I disagree with “don’t estimate” part. If it’s hard, it doesn’t mean it’s wasted effort. And it’s very valuable to business to know with higher degree of precision how much things cost to develop. It depends on many things, but from my experience, it’s possible, we went from 40% to 10% margin of error per quarter. When there’s a will, there’s a way.