By Prof. Hernan Huwyler, MBA CPA CAIO · Academic Director, IE Law School
Published ·
Last reviewed
- A risk heat map is a vage way to display risk, not a measure of financial exposure. It never tells decision-makers how much they could lose, how often, or which assumptions drive the result.
- Range compression and rank reversal can conceal important differences between risks, therefore, it will induce wrong decision-making. Simply multiplying frequency by impact with qualitative scales and scores is professional malpractice.
- Loss exceedance curves provide a more useful alternative. When historical data is limited or unavailable, model uncertainty explicitly instead of relying on arbitrary colour categories.
A risk workshop ends at four in the afternoon. Twenty people have argued for two hours about whether a vendor outage is a three or a four on likelihood, and the facilitator closes by moving a dot into a yellow cell. Everyone leaves with the feeling that something was decided. Nothing was. Nobody can say how much money the company might lose, how often, or which assumption would change the answer.
A risk heat map is a display format. It is not a risk analysis, and it cannot replace one. The replacement is a quantified model: frequency and severity estimated as ranges, combined by simulation, and reported as a loss exceedance curve that tells an executive the probability of losing more than a given amount in a year. This guide is for risk owners, fraud and cybersecurity leads, internal auditors, and AI product owners who need to defend a number in front of a board and want a method that survives questions.
The path runs in a fixed order. First you see why the matrix fails, with the research behind it. Then you replace frequency times impact with the correct combination of the two distributions, build the curve, handle missing data, add machine learning where it earns its place, and connect the output to a decision. The last section covers the politics of retiring a tool that management likes.





