Some thoughts:
As an initial demonstration of sharpness, cut through a standard gift wrapping ribbon hanging from a helium ballon resting on the ceiling. The lower half of the ribbon should fall away without moving the balloon. It is hard to do and does Not require great speed. An idle swipe should be sufficient
Edge holding while cutting rope as suggested above would be reasonably objective.
Actual skinning with the knife (beef carcass?) would be interesting. Perhaps a subjective score for overall ergonomics given by at least 5 testers would be good since it would be impossible to require enough actual skinning to allow comparison of edge holding in a reasonable time frame.
Wood cutting tasks might include making a few hundred slicing cuts through hard pine and testing for sharpness. Edge folding and small nicks can be easily seen in the surface of the wood after making the cut.
The can test is fun, and would be hard to do with a five inch blade. Empty styrofoam cups are also challenging. Cutting through high density polyethylene plastic bottles or a similar hard dense material is a good edge holding test.
In general, I would like to see the knives put through a number of tasks, some subjective, some more objective. The more objective tests (e.g. rope cutting against a board) should be done towards the end of the testing so that edge holding is not the only criteria.
Having a panel of expert testers giving their subjective impressions of ergonomics and slicing efficiency would be interesting but very hard to properly control since presumably the testers would know who made the knife unless some way could be found to hide the makers identity.
Paracelsus
[This message has been edited by Paracelsus (edited 05-01-2001).]