Views
It will be impractical and not possible to consider all uncertainties in every modelling process. This requires an informed advanced decision about which uncertainties are most important to the problem at hand, which will be specific to the circumstances and the model used. Most modellers will have an intuitive feeling on the processes and parameters which need to be considered, as dependent on understanding of the system and the accuracy and availability of data. Sensitivity analysis and screening methods can be used to give some guidance. However, such methods are best developed for linear systems. In addition, no Sensitivity analysis method can take account of processes and parameters that have not been included in the analysis, except through the identification of errors that appear to be the result of model structural error.