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title: "Most common mistakes"
canonical: "https://modelassist.epixanalytics.com/space/EA/26575525/Most%20common%20mistakes"
format: markdown
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This section describes, and provides examples for the three most common mistakes we come across in auditing risk models, even at the more elementary level. These mistakes probably constitute around 90% of the errors we see. We strongly recommend studying them, and going through the examples thoroughly.

- [Calculating means instead of simulating scenarios](https://epixanalytics.atlassian.net/wiki/spaces/EA/pages/26575526/Calculating+means+instead+of+simulating+scenarios)
- [Representing an uncertain variable more than once in a model](https://epixanalytics.atlassian.net/wiki/spaces/EA/pages/26575527/Representing+an+uncertain+variable+more+than+once+in+a+model)
- [Manipulating probability distributions as if they were fixed numbers](https://epixanalytics.atlassian.net/wiki/spaces/EA/pages/26575528/Manipulating+probability+distributions+as+if+they+were+fixed+numbers)




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