## Calculated risk probability is different that the Input Probability

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Kathy
Posts: 15
Joined: Sat Nov 26, 2005 11:06 am
Location: London, UK

### Calculated risk probability is different that the Input Probability

I assigned the risk to the resource(s) as a relative time increase and then also as a relative cost increase – both at 15% chance with 10% outcome. But the issue I seem to have when I do this is that the probability of it occurring goes above 15%. Do I potentially need to add the time delay to the task and cost increase to the resources(s) Or am I going about this all the wrong way.
Intaver Support
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Joined: Wed Nov 09, 2005 9:55 am

### Re: Calculated risk probability is different that the Input Probability

Calculated probability can vary from the input. But normally not by much. The reason is similar to throwing a dice. At each iteration, the risk has a 15% of occurring, so after 1 iteration, the probability will be 0 or 100%, after 2 0,30, or 100%. After 100 iterations, it could occur 15x (ie 15%) but could be less or more. The more iterations that are run, the closer the probability will be to 15%.
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