In 2019, Sharon, Natalie, and I (The ARCHES Evaluation Team) held a series of meetings that focused on developing and implementing the ARCHES Collaborative Diagnostic Tool (ACDT). It was decided that this tool would be used in a multi-year pilot with the Tulare-Kings College and Career Collaborative (TKCCC). The focus of this effort was to implement the ACDT with the goals of testing and refining the language, validating and calibrating outcome indicators, clarifying roles for collaboration, developing data visualizations, and developing protocols that support the collaborative analysis of data.