Quality control influence in operating production process

By further comments in the article the authors want to complete the approach to p-control cards construction. This and the previous article [Wood Industry XXV (1974), No 9-10] is a modest contribution in trying to find out adequate statistical methods practically applicable and theoretically correct. The only proper way to this purpose is a close cooperation of technologists from production and other specialists from a certain field of wood industry with the statisticians dealing with practical applications of statistical methods.