Jindřich Klůfa
Savings of the Inspection Cost in Acceptance Sampling
Číslo: 2/2018
Periodikum: Statistika
Klíčová slova: Acceptance sampling, rectifying LTPD plans, inspection by variables, single quality characteristic, one specification limit
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Anotace:
This paper refers to the rectifying sampling inspection plans with given lot tolerance percent defective (denoted
LTPD). The LTPD sampling plans minimizing mean inspection cost per lot of process average quality, when
the remainder of rejected lots is inspected, were originally designed by Dodge and Romig for inspection by
attributes (each inspected item is classified as either good or defective). The corresponding rectifying plans
for inspection by variables were created by author of this paper. Comparison of these two types of the LTPD
plans from economical point of view is presented herein. Using the LTPD plans by variables we can reach
fundamental savings of the inspection cost. In this paper we analysed the situations in which the rectifying
LTPD plans by variables are more economical than the corresponding attribute sampling plans. A criterion for
deciding if inspection by variables is to be used instead of inspection by attributes is suggested and calculated
for input parameters of acceptance sampling.
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LTPD). The LTPD sampling plans minimizing mean inspection cost per lot of process average quality, when
the remainder of rejected lots is inspected, were originally designed by Dodge and Romig for inspection by
attributes (each inspected item is classified as either good or defective). The corresponding rectifying plans
for inspection by variables were created by author of this paper. Comparison of these two types of the LTPD
plans from economical point of view is presented herein. Using the LTPD plans by variables we can reach
fundamental savings of the inspection cost. In this paper we analysed the situations in which the rectifying
LTPD plans by variables are more economical than the corresponding attribute sampling plans. A criterion for
deciding if inspection by variables is to be used instead of inspection by attributes is suggested and calculated
for input parameters of acceptance sampling.