It's also likely a made up number. I find many people think business is about careful planning and optimising what you do for the best outcome. In practice, it'

It's also likely a made up number. I find many people think business is about careful planning and optimising what you do for the best outcome. In practice, it's the opposite - you do what hope will add the highest value in the long term, then you scrabble about trying to realise that value or change tack in response to feedback. Some win, some lose, and all with varying degrees of severity.