RUEN
Home/Materials/The three-scenario method
Risk management

How to make hard decisions under uncertainty

In business, decisions often have to be made without precise figures or time for complex models. But the risk still needs to be assessed. Here is a method I have used for many years. It structures your thinking and removes the fear of making a mistake.

Updated: 26 June 2026 · Author: Evgeny Telenkov · ≈ 5 min read

The three-scenario method

The method needs no calculations. It helps you put your thoughts in order. Describe three ways events could unfold.

  • Worst. Imagine that everything has gone wrong. What losses will you suffer: money, time, reputation, relations with partners? Do not estimate the probability; just describe “rock bottom” honestly.
  • Most likely. The outcome that you feel is most likely to happen. What results will it lead to?
  • Best. What happens if everything works out perfectly. This is what you will aim for.

Two questions that give the answer

Next comes the main part. Take the most likely scenario and ask:

  1. Does it lead to my goal? If the likely outcome does not bring you closer to the reason you are starting the project, do not go in, even if you have no fears.
  2. If the answer is “yes”, move on to the worst scenario: can I survive this? Will the business stay standing, and will I avoid losing everything? If the answer here is also “yes”, you can make the decision: you can withstand the worst, and the likely outcome leads to the goal.
Three scenarios and two questions give clarity in minutes, in situations where there is neither the data nor the time for a full analysis.

I used this method back at Beeline, when I assessed the risks of IT projects and startups: their scale did not always allow a deep analysis, and the decision to go in had to be made quickly.

Frequently asked questions

When is the three-scenario method appropriate?

When you need a quick decision under uncertainty, with no precise data and no time for complex models. For large, expensive decisions, it is combined with a quantitative risk assessment.

How is this different from a full risk analysis?

It is a quick tool for speed and clarity. It does not replace a detailed analysis, but it protects against the main mistake: entering a project that does not lead to the goal even in the likely scenario, or is fatal in the worst case.

From the risk register to management decisions

Check whether your risks reach the people who make decisions. The dashboard shows the status on one screen; the turnkey system makes it work in practice.

Evgeny Telenkov
Director, Business Continuity Practice · PhD in Economics · Academic Director and Chief Examiner
Best Risk Manager of Russia 2020 (RusRisk). Built business continuity at Nornickel from scratch. Author of more than 30 continuity plans. Worked in the risk functions of Beeline, Rosneft and EY. Chief Risk Officer of a USD 20 billion petrochemical megaproject. Deputy Chair of Rosstandart Technical Committee 010 “Risk Management”, co-author of six GOST R standards. Author of the ERGP and SAFE programmes.