IRS13 Evaluation Parameters chapter E. M. Keen Harvard University Gerard Salton Use, reproduction, or publication, in whole or in part, is permitted for any purpose of the United States Government. 11-38 P I 2 P 9 12 8 II 8 II R Ranks of Relevant 1, 2, 9, 12 a) First Document Relevant, Total Relevant > 1 Ranks of Relevant 2, 3, 9, 12 b) First Document Non-Relevant, Total Relevant > 1 0 = RELEVANT x = NON-RELEVANT P P 2 R R Rank of Relevant 1 c) Total Relevant 1, First Document Relevant Rank of Relevant 2 d) Total Relevant 1, First Document Non-Relevant Illustrations of Fifth Method of "Left End Extrapolation" Fig. 22