This document summarizes a study examining the software procurement processes between a university and several software vendors over a decade. It presents three case studies of information systems development histories and analyzes them using a social process model to depict how relationships evolved over time. Major events that changed the relationship between parties were identified as "encounters", with stable periods in between labeled "episodes". While traditional models view procurement statically, this longitudinal study revealed the dynamic nature of procurement strategies over time in the case studies.