[Greg McKaskle]

Can you think of a test that would measure the effectiveness? Can you measure which will fail under different conditions? In reality, there is no perfect way to do this or most other measurements, and that is why various measurement techniques were created. Determining which is appropriate under the circumstances and how to make the evaluation is the valuable skill to learn. If you have data to backup your conclusion, I'd be happy to help you understand the data.

Greg McKaksle