Abstract
A model (“the model of the world”) does the structuring of the problem for a physical situation at hand. This may occasionally be referred to as a “mathematical model.” There are two types of models of the world, deterministic and probabilistic. Newton’s laws are good examples of deterministic models. Many important phenomena cannot be modeled by deterministic expressions. For example, failure time of equipment exhibits variability that cannot be eliminated; given the present state of knowledge and technology, it is impossible to predict when the next failure will occur. This natural variability (or randomness) imposes the use of probabilistic models that include this uncertainty, which is central to reliability/risk analysis of engineering systems. This natural variability is sometimes referred to as “randomness” or “stochastic uncertainty,” commonly known as “aleatory uncertainty,” which cannot be reduced [1, 2].
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(2010). Uncertainty Management in Reliability/Safety Assessment. In: Reliability and Safety Engineering. Springer Series in Reliability Engineering, vol 0. Springer, London. https://doi.org/10.1007/978-1-84996-232-2_11
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DOI: https://doi.org/10.1007/978-1-84996-232-2_11
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