question: private static double createSubscore ( double value , double bestValue , double variance , double bias , boolean ignoreSign ) { return Math . min ( MathUtil . normalPDFNormalized ( ( ignoreSign ? value - bestValue : Math . max ( ( value - bestValue ) , 0 ) ) / bestValue , variance , 0 ) * bias , bias ) ; }
target:  Create a normalized subscore around a current and expected value, using the normalized Normal CDF. <p/> This function is derived from the statistical probability of achieving the optimal value. Values that are less than the best value will return the best subscore, or the bias (unless ignoreSign = true).