This document discusses structured dialogic design (SDD) as a methodology for facilitating large group collaboration and decision making around complex problems. It outlines some key challenges with large group work, including complexity, lack of shared understanding, and limited cognitive abilities. SDD provides a structured process and graphic tools to help large groups unpack complexity, build shared understanding, and make informed decisions through techniques like clustering observations, identifying influence relationships, and developing action plans. The document includes examples of SDD being used to address barriers to public participation in broadband access.