Read the article Five things every project manager should know about negotiation https://www.pmi.org/learning/library/negotiate-success-element-communication-managers-6504 

Answer these questions based on this article: The basic purpose of negotiation is? What are the three types of communication models? What communications model is used in negotiations? What are the types of third-party interventions? What is the role of an arbitrator What is the role of a mediator What re roles that a project manager fills in negotiations What are the three process groups in negotiations What did Peters and Waterman mean by 'soft is hard?