As one example, I think his formula for overall complexity is mostly correct: Total Complexity = Sum[ componentComplexity x timeSpentWorkingOnThatPart] However

As one example, I think his formula for overall complexity is mostly correct: Total Complexity = Sum[ componentComplexity x timeSpentWorkingOnThatPart] However I would replace the timeSpentWorkingOnThatPart with the sum of the square roots of all separate times. i.e. Working on a component for 2 days straight versus working on it 1 hour every 2 weeks are quite different. But heh I'm sure there's other refinements and if I was writing a book I wouldn't necessarily include them. It slightly goes against the point of the book to nitpick these things as it's trying to help us think abstractly at a higher level.