The most important thing to remember about stage 5 of the negotiation framework is that when you execute, or implement the terms of an agreement, you will want to rely on the full negotiation framework and all 22 Best Negotiating Practices all over again.
At this stage you have commitment, and presumably the form of agreement necessary to support your arrangement. You may feel elated to have negotiated such a beneficial agreement, or a sense of loss that after all the effort and time you invested in the relationship, you must now move on to other negotiations with other people. In either case, you can bet that the relationship you built is the basis for your future agreements with the other side, and that the collaboration has only just begun.
Both sides can now appreciate the power of collaboration, as it produced an agreement of mutual benefit to the parties. With a foundation of trust now in place, both sides will face changes in circumstance, challenges in the relationship, and contract renewals with a renewed vigor that believes in the power of win-win negotiating.