Know when a negotiation should end and how to bring it to a close.
The desirable position is for a negotiation to terminate when all parties agree that their requirements have been satisfied or the best compromise has been reached. In some cases it may be that the negotiation cannot get to this stage at this time and may need to be deferred waiting new information or events. In either case, termination should be accompanied by a clear summary of what has been agreed, what the implications are for each party and what further actions may be needed.
The knowledge named 'Terminate a negotiation' is considered to be rather important.
In addition, the knowledge is thought to be of average complexity and learnability, it is mostly learned from experience, and is quite specialised knowledge.
Opinion is that it is justifiable knowledge.