Learn decision trees

Guides to making and analyzing decision trees: writing one, expected value, the working and what would change the answer.

• How to make a simple decision treeMake a simple decision tree in five steps: the question, the options, what could happen next and where each path ends. No numbers needed.Read the guide
• How to make a decision tree, step by stepA step-by-step guide to making a decision tree: frame the question, list options, add chances and payoffs, roll it back, and read the answer.Read the guide
• Expected value and decision trees, explainedWhat expected value means, how rollback works, and a worked example with the switch point, using a real tree you can edit.Read the guide

• Analysis calculatorPaste a decision tree and get the expected value of every option, the recommended choice, the range of outcomes and the working, step by step.Open the tool
• Expected value calculatorEnter outcomes and their probabilities to get the expected value, then turn it into a full decision tree in one click.Open the tool

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