I'm not sure I understand the question. Could you please elaborate?
The soul is dyed the color of its thoughts. Think only on those things that are in line with your principles and can bear the light of day. The content of your character is your choice. Day by day, what you do is who you become. Your integrity is your destiny - it is the light that guides your way. - Heraclitus
What's the sweet spot for a waterfall-based process? A system we've already implemented at least once before and that's so small that we can implement it fully before the world changes around us. Everything else is a sweet spot for agile methods.