I am from Switzerland and I want to know how u guys would describe an all mountain Ski? What r the most important things about it and where do u use them? I have built a ski by myself and now i have to write an essay, test my skis and compare them with two professional skis for my final mark on college. I need an exact definition for an All-Mountain-Ski. If u have an idea how to carry out the comparison between the skis or how to find out the radius, stiffness and other important things.