Zipper Clause --- A standard contract clause which precludes any renegotiation of conditions covered in the contract during the life of the contract. This clause is designed to prevent the employer from trying to change the contract before the next round of bargaining.
ZOPA --- An acronym which means Zone of Possible Agreement. It is the range or area in which an agreement is satisfactory to both parties involved in the negotiation process. It is essentially the zone between each parties real base or bottom line and is the overlap area in the low and high range that each party is willing to pay or find acceptable in a negotiation. [See also SWOT]
