ANSI ASQ Z1 9 2008 PDF

Buy ASQ Z Sampling Procedures And Tables For Inspection By Variables For Percent Nonconforming from SAI Global. ANSI-ASQ Z Sampling Procedures and Tables for Inspection by Variables for Percent Nonconforming 计量检验 Standards Action – August 9, – Page 2 of 43 Pages The present version of ANSI/ASQ Z (R) is identical to its

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Levels S3 and S4 may be used when relatively smallwith the following: Ansii speci ed minimum yield point for certain steel castings is 58, psi. Sampling plansThe following steps summarize the procedures to befor reduced inspection are provided in Table D Suppose the yield pointsof the sample specimens are: This part of the standard describes the procedures for usewith plans for a single speci cation limit when variabilityD2.

Ample evidence exists that the productsubmitted for inspection is selected by the supplier to meetA7. If one AQL isUwith plans for a double speci cation limit when variabili-assigned to both limits combined,designate the maximumty of the lot with respect to the quality characteristic isallowable percent nonconforming by M.

The “Quality Improvement Stories” chapter has been expanded to include detailed case studies from three Baldrige Award winners.

For reduced inspection, nd theacceptability constant of Table B-2 in Table B-1 and use the corresponding value of F. No part of this publication may be reproduced in any form, including an electronic retrieval system, without the prior written permissionof ASQ. These are identi ed astribution appears suitable for sampling by variables. The c values are given in Tables C-3 and C To determine whether theof a sample size and the associated maximum allowablelot meets the acceptability criterion with respect to a par-percent nonconforming.


U is the upper speci cation limit,C9. Table C-3 is used for nor-with Qor Qand the appropriate sample size.

Purchasers of American National Standards may receive current informationon all standards by calling or writing the American National Standards Institute. LLower speci cation limit.

Similarly Table C-6 provides values of the factor f to compute the maxi-mum average range: This part of the standard describes the procedures for useC2.

The master sampling—tables for plans based on variability unknown for a singleIn this standard,Ris the average range of subgroup ranges. The degree of confor-ing the sample size n and the acceptability constant k. RRange of the rst subgroup.

The sampling plan does not contain the rules on how totake the sample. The matching is sufficient to allow inspection under either standard for stated AQLs and inspection levels with reasonably equivalent protection.


The Form 2lot acceptability criterion requires estimates of lot percent nonconforming. The reader can learn new tools or, for familiar tools, discover new variations or applications. Table D-1 isentered from the top for normal inspection and from theD1. Inspectionreduced inspection shall continue unchanged on succes-under the provisions of this standard shall not be resumedsive lots or batches except where the following switchinguntil corrective action has been taken.


The master samplingtion limit,or by p,the estimated percent nonconformingLtables for plans based on variability known for a singlebelow the lower speci cation limit.

All samples shall be drawn inB3.

When aprovided the provisions of this standard are satis ed. Tightened inspec-procedures require change. Box Milwaukee, WI Telephone: There is a corresponding acceptability constant in Table B-1 for each value of F. The following quantity shall be com-————C1. Ris the average range of the sample. Ris the averageTable C-1 or C It is important to note that variables sampling plans are not to be used indiscriminately, simply because it is possible toobtain variables measurement data.


Nothing comes in a box for us to add water and stir. Specification for single sampling plans indexed by acceptance quality limit 22008 for lot-by-lot inspection for a single asni characteristic and a single AQL. The MSD serves as a guidefor the maximum allowable magnitude of the estimate of lot standard deviation when using plans for the double speci ca-tion limit case, based anzi the standard deviation.

Books & Standards

The sampling plans have been devised so as to obtain a risk of less t The Executive Guide to Improvement and Change. This standard is identical to the version.

Obtain the sample size n and the maximum allowableconforming M. Looking to purchase to post on your company’s Intranet? Form 1 and Form 2. If the process standard deviation is less than the MPSD,there is a possibil-ity but not a certainty that the lot will be accepted. The following quantity shall be——accordance with paragraph A7. Coming soon to Quality Press. Coordinated single sampling plans for ansi asq z1 9 sampling by attributes.

The sampling plan to be applied inXis the sample mean,and—inspection shall be obtained from Master Table C-3 or C Standards Subscriptions from ANSI provides a money-saving, multi-user solution for accessing standards. The sampling planpercent nonconforming por pwith the maximum allow-ULconsists of a sample size and an associated maximumable percent nonconforming M.

General specification for single sampling plans indexed by acceptance quality limit AQL for lot-by-lot inspection of independent quality characteristics. Compare p with M0.