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

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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Sampling in a Call Center

Q: I work as a quality assessor (QA) and I am assisting with a number of analyses in a call center. I need a little help with sampling. My questions are as follows: 1. How do I sample calls taken by … Continue reading

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Z1.4 and Z1.9 in micro testing and API chemical analysis

Q: I work at a cosmetics manufacturing company that produces sunscreen in bulk amounts. When we make 3,000 kg of sunscreen, we will use that in 10,000 units of final sunscreen products which will weigh 300 g each. How many … Continue reading

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Z1.4:2008 inspection levels

Q: I am reading ANSI/ASQ Z1.4-2008: Sampling procedures and tables for inspection by attributes, and there is a small section regarding inspection level (clause 9.2). Can I get further explanation of how one would justify that less discrimination is needed? … Continue reading

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AQL for Electricity Meter Testing

Q: We have implemented a program to test electricity meters that are already in use. This would target approximately 28,000 electricity meters that have been in operation for more than 15 years. Under this program, we plan to test a … Continue reading

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Sampling Plan for Pharmaceuticals

Q: We are a U.S. dietary supplements manufacturer operating under c-GMP conditions set by the U.S. Food & Drug Administration (FDA). As such, we perform analyses of incoming raw materials (finished product ingredients), intermediate products (during manufacturing), and finished products. Analyses include … Continue reading

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Sampling Employee Tasks

Q: We are collecting data on what tasks our employees in various departments do each day. We hope to eventually get a representation of what each employee does all year long.  Randomly, throughout the day, employees record the tasks they … Continue reading

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