The work on "Integrative Negotiation Consensus Building" and the "Mutual Gains Approach" provide a helpful theoretical framework for developing the theory of urban design management. Negotiation theory provides a useful framework for merging the perspectives of urban planning, city design, and real estate project proposals regarding production of the built environment. "Interests", a key construct in negotiation theory, is an important variable that will allow integrated development, as defined above, to occur. The path-breaking work of Roger Fisher and William Ury (1981), "Getting to yes", advises negotiators to focus on interests and mutual gains instead of bargaining over positions.