Option 3

This presents a list of all previously run models with some of the more important attributes of each model listed. Select the model that is closest to that required. A complete list of all the model parameters is presented - each parameter is assigned a number. Select the number of the parameter that is to be altered. The new value can then be entered. This process is then repeated until the model is as required. Enter "-1" when finished and the program then runs the model.