I would recommend "Desperate Networks" by Bill Carter for a detailed analysis, but IMHO, NBC's problem begins and ends with Jeff Zucker, probably the worst executive in the history of television. First, he, to get a bonus for himself, paid the "Friends" more than the network could posibably make back from the aging show. His bonus was based on ratings, not the fact that NBC lost money on every episode and wasted its time on these thirtysomethings playing twentysomethings, rather than develop new shows. This, of course, stripped NBC sports of the money to get quality sports rights. Then he reversed course and made the idiot decision to put Leno on at 10, where nobody watched.