1) Area definition- Mapped bounderies,Obsticle 
bounderies...???
2) Performance Chriteria-X square feet in Y minutes, must 
mow Z area in 1 charge...???
3) Size Requirements- Must be < 50 lbs, fit in 
36"X36"X36"box...???
4) Safety Requirements- Automatic shut off if touched, 
must travel < G feet per minute...???
Once we know what we want it to do we can work on how to 
do it.
                        Frank J Nastro