LECTURE 22

LECTURE 22 - ENGR 4045U Quality Control Lecture 22 1...

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ENGR 4045U Quality Control Lecture 22 1
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Schedule Week 11 Chapter 14: Process Optimization and Designed Experiments. Week 12 Part VI: Acceptance Sampling. Chapter 15: Lot-by-Lot Acceptance Sampling for Attributes. Week 13 Chapter 16: Other Acceptance Sampling Techniques. 2
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OC Curve for Sample Size 3
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Dodge Roming Sampling 4 Set of sampling inspection tables for lot-by-lot inspection of products by attributes using two types of plans: plan for lot tolerance percent defective (LTPD) protection and plans that provide a specified average outgoing quality limit (AOQL)
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AOQL Plans 5
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Dodge-Roming Inspection Table 6
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Dodge-Roming Inspection Table 7
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Dodge-Roming Inspection Table 8
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Acceptance Sampling Techniques 9 1. Take random sample of n items from the lot and compute the statistics, which is the distance between sample average and the lower specification limit in STD 2. Take a random sample of n items from the lot and compute Z(LSL) to estimate the fraction of defective of the lot as area under normal curve below Z(LSL)
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Nomograph for designing variables sampling plan 10
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A soft-drink bottler buys nonreturnable bottles from a supplier. The bottle has established a lower specification on the bursting strength of the bottles at 225 psi. If 1% or less of the bottles burst below this limit, the bottler wishes to accept the lot with probability 0.95 (p1=0.01, 1- =0.95) ,whereas if 6% or more of the bottles burst below this limit,
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This note was uploaded on 10/18/2010 for the course ENGR 3360 taught by Professor Ahmadbarari during the Fall '10 term at UOIT.

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LECTURE 22 - ENGR 4045U Quality Control Lecture 22 1...

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