PCR (Performance Class Rating) How good is it?

[partsnut]

PCR (Performance Class Rating) How good is it?

The concept and formula for the Performance Class Rating was introduced by William L. Scott in his book "Total Victory At The Track".
This concept is still being used today in a variety of software applications.
Some of us are fortunate and talented enough to adapt this concept in their own proprietary software applications.
From what I've seen and am led to believe it is most effective in races that dictate and favor the early type of runner.
It is not a factor in most sustained races that favor the late type of runners.
I used it yesterday at Santa Anita and Aqueduct and had some great results.
Here are the first three races at yesterdays Santa Anita. I believe these illustrations will give you a very interesting picture of this concept.