Some uncertainties can only be incorporated via alternatives to a single interpretation. This range of alternative interpretations of a single data set is called conceptual uncertainty. One concept is a 'string' of consecutive modeling steps, where each modeling step is represented by one domain model (e.g. Fault Model 1, 3D Structural Model 1, 3D Grid 1, etc.).

Uncertainties which are related to input parameters which you specify on the workflow forms (e.g. the fluid level of a fluid model) and which are defined by Probability Density Functions (PDFs) are the so-called parametric uncertainties. For each parametric uncertainty you can indicate if it is an independent or correlated uncertainty (e.g. you can set porosity and permeability to be correlated uncertainty parameters). When set to correlated, you must specify a parent-child relationship between the correlated uncertainty parameters. In the application, the parameters for which you can define parametric uncertainty can be recognized by a symbol () next to the parameter's entry field on the workflow form.