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Topics: Risk Management
What's the difference between Variability risk and Ambiguity risk?
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Hi here is another question for for PMP aspirants...
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Specially for PMP aspirants...
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I am not an aspirant but I dare to answer. It is enough to open a dictionary.
Variability - lack of consistency or fixed pattern
Ambiguity- the quality of being open to more than one interpretation
Neither are part of standard risk assessment because you can't predict their likelihood. It a tricky question if it is intended to aspirants.
First of all it is not really aligned with risk management because risk is defined as the efect of unknown on project objectives, second neither attribute is really relevant in a project and third because understanding how variability of a process can be measured and ambiguity resolved require a level of knowledge that even experienced project managers may not have.
Variability is the object of Lean Six Sigma and require a solid theoretical foundation with deep knowledge of statistical control.
Ambiguity should be addressed by Business Analysts and/or architects, not by the Project Managers.
I will be curios to hear the 'corect' answer because although I consider myself a subject matter expert in both Lean Six Sigma and in Risk Management I will find very difficult to explain the difference to a PMP aspirant. One because of the knowledge and experience required to master the two asects in a project and second because they are not relevant for the PMP exam.
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1 reply by George Lewis
Apr 11, 2019 5:35 PM
George Lewis
...
Hi Stelian - thanks for your response...

In regards to your doubt, I suggest you do a search on new topics of PMBOK version 6... you'll find the answer there...

Have a great day and again, thanks for your response.
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Apr 11, 2019 5:26 PM
Replying to Stelian ROMAN
...
I am not an aspirant but I dare to answer. It is enough to open a dictionary.
Variability - lack of consistency or fixed pattern
Ambiguity- the quality of being open to more than one interpretation
Neither are part of standard risk assessment because you can't predict their likelihood. It a tricky question if it is intended to aspirants.
First of all it is not really aligned with risk management because risk is defined as the efect of unknown on project objectives, second neither attribute is really relevant in a project and third because understanding how variability of a process can be measured and ambiguity resolved require a level of knowledge that even experienced project managers may not have.
Variability is the object of Lean Six Sigma and require a solid theoretical foundation with deep knowledge of statistical control.
Ambiguity should be addressed by Business Analysts and/or architects, not by the Project Managers.
I will be curios to hear the 'corect' answer because although I consider myself a subject matter expert in both Lean Six Sigma and in Risk Management I will find very difficult to explain the difference to a PMP aspirant. One because of the knowledge and experience required to master the two asects in a project and second because they are not relevant for the PMP exam.
Hi Stelian - thanks for your response...

In regards to your doubt, I suggest you do a search on new topics of PMBOK version 6... you'll find the answer there...

Have a great day and again, thanks for your response.
...
1 reply by Stelian ROMAN
Apr 11, 2019 6:20 PM
Stelian ROMAN
...
Thank you for the valuable indication. I know pretty well the PMBoK and the PMP certification process. I can guarantee that you can pass without knowing the difference between variability and ambiguity. Knowing or not knowing that won't define you you as a project manager. Many can't differentiate risks from issues but can deliver the project.
My doubt is based on 35 years of experience managing projects as well as my Lean Six Sigma and Risk Management knowledge.
Also it is good to have a look at the Agile frameworks and how risk is identified and managed in Agile. Nobody cares this days about variability vs ambiguity.
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Anyone else want to give it a try?
Network:1036



Apr 11, 2019 5:35 PM
Replying to George Lewis
...
Hi Stelian - thanks for your response...

In regards to your doubt, I suggest you do a search on new topics of PMBOK version 6... you'll find the answer there...

Have a great day and again, thanks for your response.
Thank you for the valuable indication. I know pretty well the PMBoK and the PMP certification process. I can guarantee that you can pass without knowing the difference between variability and ambiguity. Knowing or not knowing that won't define you you as a project manager. Many can't differentiate risks from issues but can deliver the project.
My doubt is based on 35 years of experience managing projects as well as my Lean Six Sigma and Risk Management knowledge.
Also it is good to have a look at the Agile frameworks and how risk is identified and managed in Agile. Nobody cares this days about variability vs ambiguity.
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Anyone else with comment on this question?

It's an open space...
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Variability risks are due to the uncertainty of outcomes in elements of the plan. They usually result in a distribution of possible outcomes. For example, a known event may take longer than planned or cost more than expected. A risk management plan might use analysis such as Monte Carlo simulation to determine a possible range of outputs.

Ambiguity risks are due to a knowledge gap. For example, we don't know whether the regulatory agency will approve the plan. A risk management plan might postulate different potential scenarios that would disrupt the plan and how they might be handled.

It's a bit like understanding the difference between an integer, and a rational number. Trivial to some, critical to others.
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1 reply by George Lewis
Apr 12, 2019 7:03 AM
George Lewis
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Keith... Thanks for your reply... Much appreciated...
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Apr 11, 2019 7:29 PM
Replying to Keith Novak
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Variability risks are due to the uncertainty of outcomes in elements of the plan. They usually result in a distribution of possible outcomes. For example, a known event may take longer than planned or cost more than expected. A risk management plan might use analysis such as Monte Carlo simulation to determine a possible range of outputs.

Ambiguity risks are due to a knowledge gap. For example, we don't know whether the regulatory agency will approve the plan. A risk management plan might postulate different potential scenarios that would disrupt the plan and how they might be handled.

It's a bit like understanding the difference between an integer, and a rational number. Trivial to some, critical to others.
Keith... Thanks for your reply... Much appreciated...
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If someone wants to look up more on this within the guide on Pag. 398 in the Risk Mgt Chapter under non-events risks.

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