Sunburst Chart have a simpler data structure, a flat, one-dimensional array. Nodes which don’t have any children are child/leave nodes. Nodes which have at least on child node are parent nodes. A Sunburst Chart consists of an inner circle surrounded by rings of deeper hierarchy levels. The angle of each segment is either proportional to a value or divided equally under its parent node.
Product Volume/Share at 2+ levels - What is the product share by physician specialty, segment and influence decile?