26 



BELL SYSTEM TECHNICAL JOURNAL 



1 _0.2 0.3 0.4 0.5 ae 0.7 0.8 0.9 10 1.1 1.2 1-3 



k= -P-( RATIO OF PROCESS AVERAGE FRACTION DEFECTIVE TOAOQL) 

 Pl 



Fig. 9 — Chart for determining allowable defect number — AOQL protection 



1.4 1.5 



