The time constraint or restrictive deadline that affects at least one side.
Theoretically, this is what governs the length of the negotiation and therefore the deadline. However, always remember that a negotiation is not an event but an ongoing process that is usually only concluded just before one side’s deadline.
It is important to ascertain the other side’s deadline without giving away your own. Then, as their deadline approaches, their stress level will increase and they will make concessions.
-Snowboy
It is important to ascertain the other side’s deadline without giving away your own. Then, as their deadline approaches, their stress level will increase and they will make concessions.