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.