Category Archives: Z1.4 & Z1.9 – Sampling

Switching Rules

Question  We are planning to implement ANSI/ASQ Z1.4-2003(R2013) sampling inspection plan with our Finish products which are currently 100% inspected by QC Inspectors.  I read  about the importance of the switching rules  on a continuing stream of lots and have the … Continue reading

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Sample Size and Z1.4

Question My question is if I’m trying to determine the sample size of migrated data to see if it migrated correctly to the target database, is the Z1.4 table applicable to that? The scenario is data is being transferred from … Continue reading

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Sample Size

Question If we have a lot size of 27 and we are using a normal inspection level II with an AQL of 2.5. What is the sample size? Answer Assuming an attribute is being measured, we use ANSI ASQ Z1.4.2013 … Continue reading

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z1.4:2008 sampling

Question: We are having an interpretation issue regarding the ANSI/ASQ Z1.4:2008 standard with some of our component vendors. We have a number of different defects that fall into an AQL of 1.0. Please note that the same question applies to … Continue reading

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Z1.4: selecting the sample size

Q: I work for a pharmaceutical company that manufactures soft gel capsules. What is the proper way to select a sample size when using ANSI/ASQ Z1.4-2008: Sampling Procedures and Tables for Inspection by Attributes? I’ll further illustrate my question with … Continue reading

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Combating contamination

Q: We want to ensure that we are receiving clean containers to package our products. How can we improve our incoming inspection process? A: You should encourage your vendor to ship only clean containers. Then, be sure that the shipping … Continue reading

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Z1.4 Split Sampling

Q: I have two questions about Z1.4-2008: Sampling Procedures and Tables for Inspection by Attributes. 1. Does the plan allow one to “split” sampling plans among multiple items, or is only one item per plan intended? 2. The plan states a … Continue reading

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