MC2 — Department & Person Communication Chord Diagram

Each ribbon is a directed flow of messages (arrowhead points to the recipient). Departments start collapsed into one arc each — click a department's arc, its label, or its legend entry to expand it into its people; connections between the other, still-collapsed departments are hidden while anything is expanded so the view stays focused. Click a ribbon or a person arc to pin its highlight; click empty space to clear the pin.