marketplace of ideas
"For every ten ideas the network hears, only one script is ordered. Out of every five scripts ordered, only one makes it to pilot. One of every three pilots eventually becomes a series, and only two every ten new series return for a second seasons. The ratio of ideas to shows that eventually make it to series is 150 to 1, and the chances of having a with one of those ideas (a series that makes it to a second season) is 750 to 1 (1986:39)."