Action Item #16 of the 2001 Management Plan called on Federal agencies to undertake measures to interdict pathways that are recognized as significant sources for the unintentional introduction of invasive species. NISC was charged with implementing a system for evaluating invasive species pathways. In response, the Pathways Work Team was tasked with developing a guide and process for invasive species pathway definition, analysis and prioritization, and identifying, describing in reasonable detail, and ranking those pathways that it believes are the most significant. In 2005, the Team produced the “Pathways Work Team Focus Group Conference Report and Ranking Guide.” The report discusses the most useful tools, methods, and monitoring systems for identifying pathways, including emerging or changing pathways, and for intervening and stopping introductions most efficiently.