PMI-RMP · Question #238
You are working with Anna on your project to determine and map the probability distributions of risk within the project. You have indicated that you will use the uniform distribution method for a…
The correct answer is C. Early concept stage of design. A uniform distribution is best suited for the early concept stage of design, where limited data means all values across a range are equally likely.
Question
You are working with Anna on your project to determine and map the probability distributions of risk within the project. You have indicated that you will use the uniform distribution method for a portion of the project. Which part of your project is most likely to have a uniform risk distribution?
Options
- ALate completion stages of a project
- BProject phases that deal with "cutover" technologies
- CEarly concept stage of design
- DProject initiating
How the community answered
(14 responses)- A7% (1)
- B14% (2)
- C79% (11)
Why each option
A uniform distribution is best suited for the early concept stage of design, where limited data means all values across a range are equally likely.
Late completion stages have well-defined constraints and remaining work, producing non-uniform probability distributions that favor specific outcome ranges.
Cutover technology phases involve known transition risks and specific failure modes that create non-uniform probability distributions.
During the early concept stage of design, there is typically insufficient historical data or expert knowledge to favor any particular outcome within a plausible range, making a uniform distribution - where every value has equal probability - the most honest and appropriate model. As the project matures and more information becomes available, distributions such as triangular or beta become more appropriate because they reflect the emerging concentration of likely outcomes. The uniform distribution is therefore a signal of maximum uncertainty about a range of possible values.
Project initiating, while early, typically leverages analogous estimates and expert judgment that introduce directional bias, making outcomes less uniformly distributed than pure concept-stage design work.
Concept tested: Uniform probability distribution in early concept stage uncertainty modeling
Source: https://www.pmi.org/pmbok-guide-standards/foundational/pmbok
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