The process of working with scenarios is similar to the process of manually copying and editing data, but without the disadvantages of data duplication and troublesome file management. This process lets you cycle through any number of changes to the model, without fear of overwriting critical data or duplicating important information. Of course, it is possible to directly change data for any scenario, but an audit trail of scenarios can be useful for retracing the steps of a calibration series or for understanding a group of master plan updates.

Before Haestad Methods: Manual Scenarios