In this paper we present a process model that uses past experience in generating arguments of persuasion. We view persuasive argumentation as an instance of problem solving. As such, we employ knowledge organization idesas and problem solving techniques that have been advocated in an analogical view of problem solving. To illustrate our ideas, we use the domain of mediation of labor disputes. Our model is implemented in the PERSUADER, a computer program that gives advice in collective bargaining meditation.