Bubble size (or segment thickness) reflects annual cost (larger = costlier); a dashed outline means no active contract/cost data. Applications with a business-value range instead of a single number plot as a horizontal segment, coloured as a gradient if the range spans two quadrants. Click a quadrant to zoom in and fill the diagram with just that group; items sharing the same (or a nearly identical) position are fanned out around a small grey tie-point with a count badge — the table has the exact values.