GGU-STABILITY: "Optimise" menu item
If the used geosynthetics will lead to an unstable slope you can use this menu item to let the program search for the optimum geosynthetics. The following dialog box opens:

Adopt the preferences and start optimisation of all geosynthetics. The result with optimum geosynthetics will be shown in a message box. Adopt the new geosynthetics with "OK". Then, restart the slope analysis using "Utilisation factors/Analyse slip bodies" menu item.