[[book - Wardley Maps]] >Consider a big hall that can contain a million marbles. If we start with one marble and double the number of marbles each second, then the entire hall will be filled in 20 seconds. At 19 seconds, the hall will be half full. At 15 seconds only 3% of the hall, a small corner will be full. Despite 15 seconds having passed, only a small corner of the hall is full and we could be forgiven for thinking we have plenty more time to go, certainly vastly more than the fifteen seconds it has taken to fill the small corner. We haven’t. We’ve got five seconds.