Book Review: From Heatmaps to Histograms
I have argued for years that risk is no longer a color. Red, amber, and green may make a report easier to scan, but they do not necessarily make risk easier to understand. The heatmap can tell an executive that something has been placed in a red box. It generally cannot explain how frequently the event might occur, what range of financial consequences the organization faces, whether a proposed control is worth its cost, or how one uncertain choice compares with another.
