Hi!
First of all, let me introduce myself. I am Adrián, Spanish Geographer and also emergency Medical Technician as a volunteer in a red cross ambulance. I just joined a Mountain Rescue group in the Red Cross here in Spain, also as a volunteer, and I think as a Geographer I can be useful for them with ArcGis. I told the group managers that with ArcGis we probably could use some function that calculates a person displacement from a point in the territory according to some costs as the slope or vegetation density.
I have the idea, but I don't know how to develop it. I told you about my idea, if anybody could tell me about an Arcgis tool, I would be very glad.