Know when to leave your existing design alone as "good enough", even if it's not perfect. Know when to improve the existing design. Know when your existing de

Know when to leave your existing design alone as "good enough", even if it's not perfect. Know when to improve the existing design. Know when your existing design cannot be improved to meet the need, and therefore you need a new one. How do you know each of these "whens"? There's nothing there that I can see. But there is some value in knowing that those are the three options that you have to decide between.