Comparisons on visual-inspection scores for the 956 systems that are in common between this work (i.e. Shu22) and C21. The top row shows the distributions of the difference in scores for the five graders (R. C, S. H. S., S. S., S. T., and Y. S.). The mean and standard deviations of the differences for individual graders are given in each sub-panel. The bottom left panel is the distribution of the difference in the average score, which has a mean of −0.01 and standard deviation of 0.36. The bottom right panel shows the 2D histogram of the average scores in C21 and Shu22. The solid black line is the one-to-one line, and the dashed black lines indicate thresholds that correspond to grade-A or B. According to average scores in C21, 72 are grade As and 274 are grade Bs. According to average scores in this work, 78 are grade As and 275 are grade Bs.