Final answer:
Vigorously persuading the other side's views is not a factor that facilitates successful integrative negotiation, as it may cause conflict. Successful negotiation relies on trust, communication, and collaborative problem-solving.
Step-by-step explanation:
The factor that does not facilitate successful integrative negotiation is Vigorously persuading the other side of the validity of your side's views. This approach can actually hinder the negotiation process as it may lead to conflict rather than cooperation. Successful integrative negotiation typically involves building trust, clear and accurate communication, acknowledging each party's perspective, and exhibiting faith in problem-solving abilities. It emphasizes collaboration and finding a win-win solution rather than persuasion or force.