What does C 0 mean in sampling plan?
Acceptance sampling is used to assess the quality based on sample size, acceptance number, and desired quality level. C=0 sampling plans are based on the premise of accepting the lot if zero defects are found during the inspection, and rejecting the lot if one or more defects are found during the inspection.
What is OC curve?
What is an operating characteristic (OC) curve? The operating characteristic (OC) curve depicts the discriminatory power of an acceptance sampling plan. The OC curve plots the probabilities of accepting a lot versus the fraction defective. When the OC curve is plotted, the sampling risks are obvious.
What is a C=0 sampling plan?
Another way to define C=0 is the acceptance number (a) is zero (0); in other words, we accept the lot if zero (0) defects are detected. C=0 sampling plans provide more protection to the consumer, which is especially important when health and human welfare are involved.
What is a zero acceptance sampling plan Aql?
Using the Zero Acceptance AQL 1.0 C=0 Sampling Plan. Statistically speaking, N is the population of total parts, n is the sample size, and c is the amount of bad parts that will be allowed. So, a c=0 sampling plan simply means that if one defect is found among the sample size (n), the entire lot (N) is either rejected or subject to 100% inspection.
What is the minimum amount of product required for C=0 sampling?
Most of the time to routinely accept lots of product using a C=0 sampling plan the actual lot defective level will have to be 1/4 to 1/10 that of the desired AQL. For instance, referencing ANSI Z1.9 for an indexed plan with an AQL of 1% having an acceptance number of 0 gives a sampling plan of n=13 and a=0.
How do you calculate Sample size when C=0?
Calculator Sample Size for Attributes when C=0 The basic formula for sample size based on the desired Confidence level and Reliability is: n = ln(1 − confidence) ln(reliability)