The Local Child Outcomes Measurement System (L-COMS) is a framework that identifies seven key components of a high-quality child outcomes measurement system at the local level. The L-COMS framework was designed to apply to all local programs regardless of their specific child outcomes measurement approach. Development of the L-COMS originated with the Early Childhood Technical Assistance Center/Center for IDEA Early Childhood Data Systems (ECTA/DaSy) technical assistance cohort on child outcomes data quality. Several states were interested in a product that would help support the improvement of child outcomes measurement systems at the local level. It was derived from the Child Outcomes Measurement System (COMS), a similar framework developed by the Early Childhood Outcomes (ECO) Center in 2011 for state use. ECTA and DaSy staff developed a draft of the L-COMS, using the COMS to identify comparable quality indicators and elements that could be used as is or revised to make applicable to the local level. Staff from several states then reviewed and piloted it at the local level and provided input.