I have to report risks and fill out the field "mitigation".

What does risk mitigation normally mean: reducing the likelyhood/probability or the impact?

  • My guess is: its not clearly defined but means lowering the product of probability and impact.
    – Bastl
    Commented Oct 1, 2015 at 6:11
  • 1
    Any basic resource on risk will answer this. "mitigation" means reducing the total risk. That can involve lowering the probability, or lowering the impact.
    – MCW
    Commented Oct 1, 2015 at 12:34

3 Answers 3


In risk mitigation you look through your project looking for risks, their probability and their impact. After that create scenarios what you'll do in case the risk happens.

For example, you are doing construction in East Asia. The risk is the monsoon season starts earlier (it will definitely start, but the risk is that it starts earlier than you expect) and you'll do A and B in order to keep the project going and keep your employees safe.

Another example for IT. There is a risk that users are going to cancel their subscriptions to your service if you change a certain feature. As a mitigation, before launch you'll do an A/B test to see the if the risk is real, moreover you make it possible to turn the feature back on in case the number of users decreases more than you expect.

You'll put all these into the document and ask other experts for review and insight.

  • So mitigating action is what i do proactively in advance, whereas plan-b is reactive, after the event has occured? Reducing the probability is more externally: its tricky to reduce the probability for the monsoon or the acceptynce oft users.
    – Bastl
    Commented Oct 1, 2015 at 10:31
  • Yes, and you don't reduce the probability of the monsoon, but prepare what you'll do in case it starts earlier. The risk is not related to the known - monsoon -, but to the unknown - when will it start.
    – Zsolt
    Commented Oct 1, 2015 at 10:41
  • And about the users' acceptance. Let's say you have 100 users and you think there is a 25% chance of leaving the product - one from five users will leave - after the release. You can test in advance whether this number is correct with A/B testing. In case after the test it still 25%, you can decide if the new feature will produce more income with the remaining 75 users, than without with 100.
    – Zsolt
    Commented Oct 1, 2015 at 10:45

Unfortunately a lot of the time the concepts of "risk mitigation" and "risk response" are conflated.

There are several categories of risk response, of which mitigation is one. Specifically:

  • Risk Avoidance. This is a response where you are reducing probability and/or impact to nil, usually by changing some aspect of the project like scope.
  • Risk Transfer. Here you are handing responsibility for the risk to a third party. For example, if there is a liability risk you could transfer that risk by purchasing appropriate insurance.
  • Risk Acceptance. This is basically a non-response, you have identified a risk but either you can't do anything about it or the impact of the risk is so minor that it isn't worth the effort to address it.
  • Risk Mitigation. This response implies that you are reducing probability and/or impact of a risk, but the final probability/impact remain non-zero. These could be proactive approaches (e.g. we mitigate the risk that FDA won't approve our drug by seeking regular feedback from them on our licensure plan), or reactive (e.g. having a fallback plan in place in case the risk is realized).
  • Risk Sharing. Here you are sharing the risk with a third party, for example a sub-contractor. Note that in this case you are also likely going to have to share some benefits.
  • Risk sharing and transfer is the same thing. Commented Oct 1, 2015 at 13:52
  • Based on the PRINCE2 standard they are different. The critical thing is that if A transfers risk to B, the entirety of the impact of the risk is now on B's plate. In contrast with risk sharing both A and B will suffer if the risk is realized.
    – Doug B
    Commented Oct 1, 2015 at 14:25
  • Oh, ok. I never studied PRINCE2. It reads to me the degree of transfer where the impact is completely off loaded. But that's why these hard definitions seem silly to me. Commented Oct 1, 2015 at 14:30

Using strict definitions, mitigation is what you do proactively to reduce either or both the probability and/or impact of a threat. After you perform the mitigation, you may end up with zero probability the threat will occur or have some residual risk remaining that is acceptable. A contingency plan is what you have in place after the threat occurs or when a certain trigger point occurs. So this is reactive.

Here is where it becomes complex. We have a tendency to treat threats as discrete when in fact a threat is typically in a chain of threats. In other words, when on threat occurs, it becomes a risk factor of other threats to occur. Therefore, your contingency, or reactive plan, for the first threat is really a mitigation plan for the next set of threats. For example, when you start your car, you assume and accept some level of risk of a spontaneous tire failure. You mitigate this by rotating your tires at a set frequency, maintaining proper pressure, inspecting, etc. However, you still have some residual threat. If that threat occurs, you have a spare tire as your contingency plan. However, you now have other threats such as changing your tire next to the highway with the threat of getting hit, being stranded at night in the winter on a lonely, deserted road. And this continues on.

So I would recommend not getting bogged down with strict definitions. Risk management is about resilience. It is about looking at the entire chain of linked events and breaking the chain where you can or being able to continue if you can't break it by breaking another link down the line. Call it mitigation, contingency, recovery, plan B, avoidance, whatever.

EXCEPT, if you're studying for the PMP. Then learn the strict definitions.

  • I like the reference to contingency and the differentiation between proactive and reactive impact-mitagations (contingency). I also like the comment on common sense, and the PMP exception :-)
    – Bastl
    Commented Oct 5, 2015 at 8:40

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.