Tag Archives: jim bossert

DPPM Calculation

Question Recently, there is a debate in my organization about Defective Parts Per Million (DPPM) computation. Camp 1 – DPPM = (No of parts rejected / No of parts inspected) * 1,000,000 Camp 2 – DPPM = (No of parts … Continue reading

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Acceptance Sampling Inspection

Question We have an Acceptance sampling inspection in place where we use the ANSI/ASQ Z1.4 – 2013 standard under Normal Inspection, using General Inspection Level II to drive our samples size and accept, reject criteria. We do not uses switching … Continue reading

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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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Inspection Sample Size

Question The customer expects certain levels of inspection: pull 157 bottles for visual testing, but then they also want 20 pulled for dimensional testing. Can’t the 20 additional bottles be a subset of the original testing sample? When calculating the … Continue reading

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DMAIC Guidelines

Question Are there general guidelines or target durations for each phase of DMAIC? Knowing that we have fruit salad in our portfolio – apples, oranges, grapes, melons, plus 10 more – are there recommendations on how to generate meaningful guidelines … Continue reading

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Sampling

Question Is there a sampling plan for determining the number of cases to pull in a batch from which you perform the ANSI/ASQ sampling of individual products?  For example: you receive 550 cases with 145 product vials/case.  Is it proper … Continue reading

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Six Sigma Black Belt

Question I am currently an Executive Chef working that has been taking online classes for Green & Black Belt Six Sigma.  I am about halfway through my Black Belt classes and would like to pursue my certifications.  However, my company … Continue reading

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Control Chart to Analyze Customer Satisfaction Data

Q: Let’s assume we have a process that is under control and we want to monitor a number of key quality characteristics expressed through small subjective scales, such as: excellent, very good, good, acceptable, poor and awful. This kind of data is … 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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Guidance on Z1.4 levels

Q: My company is using ANSI/ASQ Z1.4-2008 Sampling Procedures and Tables for Inspection by Attributes, and we need some clarification on the levels and the sampling plans. We are specifically looking at Acceptable Quality Limits (AQLs) 1.5, 2.5, 4.0, and … Continue reading

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