Quality Control Graphs and Analytics.
USE AN EWMA chart because we're using her entire history. for perminant variation
For the positive negative you can do n and np charts x bar and s charts for the remainder of the charts
c control charts for the actual scores, lots of opportunities for it to occur.
Use an Operating Characteristic Curve to get the probability for finding something wrong in the process for the scores after a given number.
Cumulative sum (cusum) - to see if the process
#TODO -- play with variable control limits
The next step is to FIND THE trigger words