The zone of possible agreement (ZOPA) or bargaining range is considered an area where two or more negotiating parties may find common ground. It is this area where parties will often compromise and strike a deal. In order for negotiating parties to find a settlement or reach an agreement, they must work towards a common goal and seek an area that incorporates at least some of each party's ideas.

The zone of proximal development refers to the difference between what a learner can do without help and what he or she can achieve with guidance and encouragement from a skilled partner.

There is no Walk away area. Walk away point is a position from which you cannot concede any more ground and must walk away/decline a deal.

Best alternative to a negotiated agreement is a fallback or backstop position if the negotiation fails to result in an agreement/no deal is agreed.

LO 1, AC 1.2