A person with an idea. The system rejected it three times. The person with an idea made plans to leave the company. Fortunately, through outside intervention, his idea finally got accepted. It was so successful that it made money in its first year.
Passion is critical.
The idea's originator, or an enthusiastic collaborator, needs to champion it. Imagine a trial where only one side is present. That's what happens in many companies. The idea is presented to a group of skeptics. Lack of a champion equals failure.