This process should only be used when you know you won't be guaranteed 8 hours of sleep for a little while. Even so, it takes a couple weeks to even get used to the new sleep schedule. There are plenty of people who take their regular 8 hour sleep schedule and separate it into individual naps throughout the day, but the point is is that 8 hours will always be the required amount of sleep for peak performance, whether or not you do it all in one go every day.