In an evaluation of First 5 services to families and children in Monterey County, an inter-organizational network mapping procedure was employed at two time periods to identify changes in levels of coordination and collaboration among service providers who receive funds from First 5 Monterey County. Across a one year period, there was an increase in the number of interactions between funded partner agencies, with the increase in ties occurring at the Networking and Coordination levels, but with slightly fewer ties at the Collaboration level. The results raise questions about how best to engage participating organizations and other stakeholders in increasing levels of collaboration, when is the right time to measure changes in systems, and whether an increase in collaboration is a necessary or sufficient condition to determine improvement in systems change outcomes. #EvaluationUse #2011Conference #SocialNetworkAnalysis #SystemsinEvaluation