CRANV2 Aslib Cranfield Research Project: Factors Determining the Performance of Indexing Systems: Volume 2 Simulated ranking and document output cut-off chapter Cyril Cleverdon Michael Keen Cranfield An investigation supported by a grant to Aslib by the National Science Foundation. Use, reproduction, or publication, in whole or in part, is permitted for any purpose of the United States Government. - 219 - 421 FIGURE 5.24T RESULTS AS Fig. 5.3T ADJUSTED FOR WEIGHTING BASED ON RELEVANCE GRADES.