This paper proposes that experience knowledge would be beneficial for iterative software development. In this paper, experience knowledge- based artifacts have been linked to Extreme Programming via peer reviews. Experience knowledge can be defined as human experiences documented with the object of exploiting them in the organization. Extreme Programming has been selected to represent iterative software development processes. Systematically gathering experiences would support building evidence for improving and teaching iterative software development processes. This paper presents one possible solution as to how to put experience knowledge in practice in the context of iterative software development processes. It also reports results from projects where experience knowledge has been studied. The main findings of this paper are two ways in which experience knowledge- based artifacts can be used with iterative software development, and that peer reviews are a good way to collect and treat experience knowledge-based artifacts. .