scholarly journals Sampling Inspection Plans for Continuous Production which Insure a Prescribed Limit on the Outgoing Quality

1945 ◽  
Vol 16 (1) ◽  
pp. 30-49 ◽  
Author(s):  
A. Wald ◽  
J. Wolfowitz
Keyword(s):  
Continuous Production ◽  
Sampling Inspection

scholarly journals The study of the conformity criterion for compressive strength of concrete based on order statistics

2013 ◽  
Vol 12 (3) ◽  
pp. 223-230 ◽  
Author(s):  
Elżbieta Szczygielska ◽  
Wiktor Tur
Keyword(s):  
Compressive Strength ◽  
Order Statistics ◽  
Continuous Production ◽  
Statistical Quality Control ◽  
Preliminary Evaluation ◽  
Test Results ◽  
Control Plan ◽  
Sampling Inspection ◽  
The Monte Carlo Method ◽  
New Criterion

The test of concrete compressive strength conformity with current regulations PN EN 206-1:2003 is the sampling inspection based on a numerical evaluation. Satisfying the compound criteria, including the adoption of statistical quality control plan, confirms the conformity of the examined batch of concrete defined by the declared class of compressive strength defined by characteristic value of compressive strength. The conformity criteria recommended by EN 206-1 for the initial production are not without flaws and they are critically evaluated by many authors. This paper presents a new criterion of conformity based on order statistics. A preliminary evaluation of the criterion was made for the series with a small number of the test results with the use of probability of acceptance determined by means of the Monte Carlo method with the assumed 5% fraction defective. The analysis of the results showed that the presented criterion does not depend on the dispersion of results whereas the probability of acceptance is maintained at a constant level approached to the appropriate one at the stage of continuous production.

GENERALIZED CSP-(C1, C2) SAMPLING PLAN FOR CONTINUOUS PRODUCTION PROCESSES

2005 ◽  
Vol 12 (02) ◽  
pp. 75-93
Author(s):  
S. BALAMURALI ◽  
M. KALYANASUNDARAM ◽  
CHI-HYUCK JUN
Keyword(s):  
Markov Chain Model ◽  
Continuous Production ◽  
Sampling Plan ◽  
Chain Model ◽  
Sampling Plans ◽  
Continuous Sampling ◽  
Sampling Inspection ◽  
Average Fraction ◽  
Special Case ◽  
Measures Of Performance

In this paper, a new continuous sampling plan is introduced whose sampling inspection phase is characterized by the maximum allowable number of nonconforming units c1 and c2 and the sampling rates f1 and f2 and is designated as CSP-(C1, C2). A Markov chain model for the proposed plan is formulated and certain common measures of performance are derived. The continuous sampling plan of type CSP-C developed by Govindaraju and Kandasamy12 is a special case of this new sampling plan. Moreover, Dodge's continuous sampling plan (CSP-1) also becomes a special case of proposed plan. The advantage of the proposed plan is to achieve a reduction in the average fraction inspected at good quality levels compared with the CSP-1 and other continuous sampling plans.

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