uncertainty
Dictionary Definition
[M-W] 1: the quality or state of being uncertain : doubt 2: something that is uncertain
Committee Definition
a potential deficiency in any phase or activity of the modeling, computation, or experimentation process that is due to inherent variability or lack of knowledge. [ASME V&V10]
Domain Specific Usage
This section should refer to any contextual or domain/discipline-specific definition, which has been vetted or agreed by the experts of the particular area.
Notes & Discussions
irreducible uncertainty: inherent variation associated with the physical system being modeled. Also called “aleatory uncertainty.” For example, the yield strength of the steel in a production lot of beams follows a probability distribution. With many observations, this distribution can be defined, but it cannot be eliminated. [ASME V&V10]
reducible uncertainty: the potential deficiency that can be reduced by gathering more data, observations, or information. Also called “epistemic uncertainty.” An example is the mathematical form used to describe how force in a spring develops when the spring is deformed. The spring may be linear or nonlinear with respect to deformation. Some simple tests will reveal the nature. [ASME V&V10]
References
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