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Good modeling practice requires that the modeler provides an evaluation of the confidence in the model, possibly assessing the uncertainties associated with the modeling process and with the outcome of the model itself.

Uncertainty and Sensitivity Analysis offer valid tools for characterizing the uncertainty associated with a model.

Uncertainty analysis ( UA ) quantifies the uncertainty in the outcome of a model.

Sensitivity Analysis has the complementary role of ordering by importance the strength and relevance of the inputs in determining the variation in the output.