A METHOD OF SAMPLING INSPECTION 631 



values of Zmm., k, and (c, a) in equation (1') and solving for M. If, for 

 this value of M thus found, the selected values of c and a coincide 

 with those read respectively from Figs. 2 and 3, a point was established 

 for the given value of Zmin. on the M, k plane. If not, sufficient trials 

 were made until the condition given by Figs. 2 and 3 were met. The 

 curves for s^jin. were thus determined. To obtain /nun. it was only 



necessary to use the relation /min = -^^^ ' 



Pt 



