I've "finish[ed] more correct programs on time" by planning all of the details in a Design Document before writing a line of code, than I ever have by planning

I've "finish[ed] more correct programs on time" by planning all of the details in a Design Document before writing a line of code, than I ever have by planning at a high level only before implementing, but that's just my personal anecdote. Although, I do take the MVP-then-iterate approach if I don't have a tight deadline, because the early feedback loop can be invaluable in that type of development process.