This standard specifies the procedure and implementation method of single sampling inspection of standard type by counting with the percentage of batch defective products as the quality index, and is applicable to the sampling inspection of single batch quality assurance. This standard replaces GB/T13262-1991 "Standard single sampling inspection procedure and sampling table of defective product rate by counting". Compared with GB/T13262-1991, the changes in the technical content of this standard mainly include: - Changing the batch quality index from batch defective product rate to batch defective product percentage; - Adding several terms such as qualified quality level and actual quality level; - Adding the discussion of judging by comparing the actual quality level with the qualified quality level; - Recalculating the original sampling plan table, and modifying the individual sampling plans in the original GB/T13262-1991; - Special emphasis is placed on the fact that this standard can be applied to operations, work-in-progress, inventory, maintenance operations, data or records, and management procedures in addition to final products, parts and components and raw materials. GB/T 13262-2008 Procedure and sampling table for standard single sampling inspection of
percentage of nonconforming products by attributes GB/T13262-2008 Standard download decompression password: www.bzxz.net This standard specifies the procedure and implementation method for standard single sampling inspection of attributes with percentage of nonconforming products in batch as quality indicator, and is applicable to sampling inspection for single batch quality assurance.
At present, the International Organization for Standardization (ISO) has not promulgated such a standard. This standard refers to the Japanese standard JISZ9002. Compared with the Japanese standard JISZ9002, the changes in technical content mainly include:
--- The main table and auxiliary table are combined into one table to make it easier to retrieve the sampling plan.
--- The p0 value is changed from 21 intervals to 34 intervals.
--- The starting value of the p0 interval is changed from the R20/2 series to the R40/2 series.
This standard replaces GB/T13262-1991 "Standard single sampling inspection procedure and sampling table for defective product rate by counting".
Compared with GB/T13262-1991, the technical content of this standard mainly includes:
--- Changing the batch quality index from batch defective product rate to batch defective product percentage;
--- Adding several terms such as qualified quality level and actual quality level;
--- Adding the discussion of comparing the actual quality level with the qualified quality level for judgment;
--- Recalculating the original sampling plan table, modifying the individual sampling plans in the original GB/T13262-1991;
--- Specially emphasizing that this standard can be applied to operations, work-in-progress, inventory, maintenance operations, data or records, and management procedures in addition to final products, parts and components and raw materials.
This standard is proposed by the China National Institute of Standardization.
This standard is under the jurisdiction of the National Technical Committee for Standardization of Statistical Method Application.
The drafting organizations of this standard are: China National Institute of Standardization, Guangzhou Product Quality Supervision and Inspection Institute, Second Academy of China Aerospace Science and Industry Corporation, Ordnance Engineering College of the Chinese People's Liberation Army, Shandong Entry-Exit Inspection and Quarantine Bureau.
The main drafters of this standard are: Yu Zhenfan, Deng Suixing, Ding Wenxing, Yin Qin, Zhang Yuzhu, Chen Yuzhong, Wang Dong.
The previous versions of the standards replaced by this standard are:
---GB/T13262-1991.
The clauses in the following documents become the clauses of this standard through reference in this standard. For any dated referenced document, all subsequent amendments (excluding errata) or revisions are not applicable to this standard. However, the parties to an agreement based on this standard are encouraged to study whether the latest versions of these documents can be used. For any undated referenced document, the latest version applies to this standard.
GB/T321 Priority numbers and priority number systems
GB/T2828.1-2003 Sampling procedures for inspection by attributes Part 1: Sampling plans for batch inspection based on acceptance quality limit (AQL) (ISO2859-1:1999, IDT)
GB/T10111 Generation of random numbers and their application in product quality sampling inspection
GB/T13264 Small batch sampling procedures and sampling tables for percentage of nonconforming products by attributes
GB/T19000-2000 Quality management system fundamentals and vocabulary (ISO9000:2000, IDT)
ISO3534-1:2006 Statistical vocabulary and symbols Part 1: General statistical terms and terms used in probability
ISO3534-2:2006 Statistical vocabulary and symbols Part 2: Applied statistics
Preface I
Introduction II
1 Scope 1
2 Normative references 1
3 Terms, definitions and symbols 1
3.1 Terms and definitions 1
3.2 Symbols 3
4 Sampling test procedure 4
5 Implementation of sampling test 4
6 Sampling plan table 5

ICS03.120.30
National Standard of the People's Republic of China
GB/T13262—2008
Replaces GB/T13262—1991
Standard for percentage of nonconforming products by attributes
Single sampling procedures and tables for inspection having desired operating characteristicsby atiributes for percent nonconforming2008-07-16Promulgated
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of ChinaAdministration of Standardization of the People's Republic of China
Digital injury
Implemented on 2009-01-01
GB/T 13262—2008
Normative references
3 Terms, definitions and symbols
3.1 Terms and definitions
3.2 Symbols
4 Procedures for sampling inspection
5 Implementation of sampling inspection
Sampling plan table
GB/T13262—2008
Currently, the International Organization for Standardization (ISO) has not promulgated such a standard. This standard refers to the Japanese standard JIS7.9002. Compared with the Japanese standard J1SZ9002, the technical changes mainly include: merging the stop table and the auxiliary table into one table to facilitate the inspection. The value of is reduced from 21 intervals to 34 intervals. The starting value of the p interval is changed from the R20/2 series to the R40/2 series. This standard replaces GB/T13262-1991 "Standard single sampling inspection procedure and sampling table for defective product rate by counting". Compared with GB/T13262-1991, the changes in the technical content of this standard mainly include: changing the batch quality index from batch defective product rate to batch defective product percentage; adding several terms such as qualified quality level and actual quality level; adding the discussion of comparing the actual quality level with the qualified quality level for judgment, recalculating the original sampling plan table, and amending the individual sampling plans in the original GB/T13262-1991. It is particularly emphasized that this standard can be applied to operations, work-in-progress, inventory, maintenance operations, data or records, and management procedures in addition to final products, parts and raw materials. This standard was proposed by the China National Institute of Standardization and is under the jurisdiction of the National Technical Committee for Standardization of Statistical Methods. Drafting units of this standard: China National Institute of Standardization, Guangzhou Product Quality Supervision and Inspection Institute, Second Academy of China Aerospace Science and Technology Corps, People's Liberation Army Ordnance Engineering College, and Shandong Exit-Entry Inspection and Quarantine Bureau. The main drafters of this standard are: Yu Zhenfan, Deng Suixing, Ding Wenxing, Yin Qin, Zhang Yuzhu, Chen Yuzhong, Gong Dong. The previous versions of the standards replaced by this standard are: GB/T 13262-1991.
GB/T13262-2008
The sampling scheme designed by this standard is a standard bundle sampling scheme, which can be used for sampling inspection of an isolated batch of products without using previous data, so it is also called single batch quality assurance sampling inspection. The sampling scheme specified in the standard controls the probability of two kinds of misjudgment at the same time. When the user has strict requirements on the quality of each batch of products, or has no knowledge of the quality history of the products provided by the supplier, it is appropriate to adopt this kind of scheme.
The scope of application of this standard is different from that of G3/T2828.1-2003. GB/T2828.1-2003 is applicable to acceptance sampling of continuous batches, but not to sampling inspection of isolated batches. The main reason is that GB/T2828.1-2003 is retrieved by acceptance quality limit AQL. The scope of application of this standard is different from that of ISO2859-2. The main reason is that ISO2859-2 is retrieved by limit quality LQ. The sampling inspection procedure specified in this standard is for isolated batches. This standard designs some rules so that when the actual quality level of the batch meets the qualified quality level, the risk of not accepting the batch is very small. If it is also required that when the actual quality level of the batch does not meet the qualified quality level, the risk of accepting the batch is also very small, a larger sample size must be required. In order to make the sample size appropriate, it is allowed that when the actual quality level does not meet the qualified quality level, the risk of accepting the batch is slightly higher. 1 Scope
Standard type of counting for percentage of nonconforming products
Sampling inspection procedure and sampling table
GB/T13262—2008
This standard specifies the procedure and implementation method of standard type of counting for percentage of nonconforming products as the quality indicator, and is applicable to the sampling inspection of single batch quality assurance. This standard is applicable to the situation when the batch size of the inspection batch is greater than 250 and the ratio of batch size to sample size is greater than 10. When the batch size is less than 250 or the ratio of batch size to sample size is not greater than 10, the sampling plan retrieved by this standard is approximate, and it is recommended to determine the sampling plan according to the method specified in CB/13261.
The risk of the producer specified in this standard is a=0.05, and the risk of the user is β=0.10. The sampling scheme provided in this standard can be used for (but not limited to) the following products (outputs): final products: parts and raw materials: operations; work-in-progress: inventory; maintenance operations; data or records; management procedures. 2 Normative references The clauses in the following documents are incorporated into this standard through reference. For dated references, all subsequent amendments (excluding errata) or revisions are not applicable to this standard. However, the parties to the agreement reached based on this standard are encouraged to study whether the latest versions of these documents can be used. For any un-dated referenced document, the latest version shall apply to this standard GB/T321 Priority numbers and priority number systems
CB/T2828.1—2003 Sampling procedures for inspection by attributes Part 1: Sampling plans for batch inspection based on acceptance quality limit (AQL) (ISO 2859·1:1999, IDT)
GB/T10111 Generation of random numbers and its application in product quality sampling inspection GB/T13264 Small batch sampling inspection procedures and sampling tables for the percentage of nonconforming products CB/T19000—2000 Quality management system fundamentals and vocabulary (ISO9000:2000, IDT) ISO3534-1:2006 Statistical vocabulary and symbols Part 1: General statistical terms and terms used in probability ISO3534-2:2006 Statistical vocabulary and symbols Part 2: Applied statistics 3 Terms, definitions and symbols
The terms, definitions and symbols determined by GB/T2828.1—2003, ISO3534-1:2006, IS03534-2.2006 and GB/T19000—2000 and the following terms, definitions and symbols apply to this standard. For ease of reference, some terms are directly quoted from the above standards. 3.1 Terms and Definitions
Inspection by attributes Inspection by attributes Inspection of a specified requirement or a group of requirements, or only classifying unit products as qualified or unqualified, or only counting the number of unqualified units in the unit product:
Note: Inspection by attributes includes both inspection of the percentage of unqualified products and inspection of the number of unqualified units per hundred units. 3.1.2
Unit product item
Things that can be described and examined separately.
For example:
"a tangible entity;
a certain amount of material;
a service, an activity or a process
an organization or an individual
any combination of the above items.
Inspection lot
abbreviated as batch. A certain number of a certain product, material or service collected together. Note: An inspection lot can consist of several production batches or parts of a production batch. 3. 1. 4
noaconfnrmity
nonconforming
nonconforming item
product with one or more nonconforming items. 3.1.6
batch size
the number of unit products in the batch.
sample
one or a group of unit products randomly selected from the batch and providing information about the batch. 3. 1.8
Sample size
tsamplesize
The number of unit products contained in the sample3. 1. 9
conforimity guality level
Acceptable quality level
The percentage of nonconforming products allowed in the lot! 3. 1. 10
Lot quality level
lot quality level
The percentage of nonconforming products in the lot
Lot conformity
The percentage of nonconforming products in the lot is less than or equal to the acceptable quality level. 3.1.12
Lot nonconformity
The percentage of nonconforming products in the lot is greater than the acceptable quality level. 2
(Batch) Percentage of nonconforming (inalot) The number of nonconforming products in the whole or batch divided by the batch size and then multiplied by .1100, that is: D/NX100
Where: D is the number of nonconforming products in the batch, and N is the batch size. 3. 1. 14
Acceptance number
The maximum number of nonconforming products allowed in the sample of the acceptance batch. 3. 1. 15
Sampling planwww.bzxz.net
The combination of the sample size used and the relevant batch acceptance criteria. 3. 1.16
Single sampling inspectionGB/T13262—2008
The sampling inspection process of taking only one sample from the batch and judging whether the batch is accepted by the number of nonconforming products in the sample. 3.1.17
Producer's risk
For a given sampling plan, the probability of not accepting a batch when the batch quality level is exactly the acceptable quality level. Note: The producer's risk in this standard is specified as 5%. 3.1.18
Consumer's risk
For a given sampling plan, the probability of accepting a batch when the batch quality level is a specified percentage of nonconforming products. Note: The consumer's risk in this standard is specified as 10%. 3.1.19
Producer's risk qualityFor a given sampling plan, the batch quality level corresponding to the specified producer's risk. Note: The producer's risk quality is equal to the acceptable quality level. 3.1.20
Consumer's risk qualityFor a given sampling plan, the batch quality level corresponding to the specified consumer's risk. 3.1.21
Standard sampling inspection plan sampling plan for having desired operating characteristics is suitable for both producer risk quality, user risk quality, producer risk and user risk. 3.2 Symbols
The symbols and abbreviations used in this standard are as follows: N batch
n sample size
Ac number of acceptances
(n;Ac) sampling plan
producer risk quality
P user risk quality
producer risk
GB/T 13262—2008
user risk
D number of nonconforming items in the batch
d number of nonconforming items in the sample
P batch quality level
P. () When the quality level of the batch is equal, the probability of accepting the batch is 4 according to the sampling plan. The procedure for implementing this standard is as follows: a) Specify the quality characteristics of the unit product: Specify the classification of unqualified quality characteristics and the classification of non-conforming products: b) Specify the risk quality of the producer and the risk quality of the user: c) Form the inspection batch and search the sampling plan: Draw samples; Inspect samples; Make a decision on whether to accept the batch based on the judgment criteria; Disposal of the inspection batch.
Implementation of sampling inspection
5.1 Specify the quality characteristics of unit products
In technical standards or contracts, the quality characteristics that need to be sampled for unit products should be specified with the criteria for judging whether they are qualified or not. 5.2 Specify the classification of unqualified quality characteristics and the classification of non-conforming products. 5.2.1 Classification of unqualified quality characteristics
Usually, according to the importance of the unit product quality characteristics or the severity of the non-conformity of the quality characteristics, non-conformities are divided into three categories: Class A, Class B and Class C. Class A non-conformity is the most concerned type of non-conformity, and Class B non-conformity is a type of non-conformity with a lower degree of concern than Class A. According to the actual situation of the product: it can also be divided into less than three categories or more than three categories of non-conformity. 5.2.2 Classification of non-conforming products
According to the classification of unqualified product quality characteristics, the categories of non-conforming products are divided respectively. Nonconforming products are usually classified according to the severity of the nonconformity, for example:
Class A contains one or more nonconforming products of Class A, and may also contain nonconforming products of Class B and (or) Class C. Class B contains one or more nonconforming products of Class B, and may also contain nonconforming products of Class C, but does not contain nonconforming products of Class A.
5. 3 Provisions on producer risk quality and user risk quality 5.3. 1 Provisions on producer risk quality
For batch-produced products, the batch quality requirements (qualified quality level) of the products shall be specified in the product technical standards. The producer risk quality shall be determined by negotiation between the producer and the user based on the requirements for batch quality in the product technical standards; generally speaking, the producer risk quality shall be equal to the qualified quality level. Different production risk qualities shall be specified for different nonconforming product categories. The production risk quality specified for Class A nonconforming products shall be less than that for Class B nonconforming products. The production risk quality specified for Class C nonconforming products shall be greater than that for Class B nonconforming products. 5.3.2 Provisions for user risk quality
GB/T 13262--2008
User risk quality shall be determined by negotiation between the production party and the user based on the requirements for batch quality in the technical standards, taking into account factors such as protection of user power and the economy of sampling. Different user risk qualities shall be specified for different nonconforming product categories. Generally, the user risk quality specified for Class A nonconforming products shall be less than that for Class B nonconforming products. The user risk quality specified for Class C nonconforming products shall be greater than that for Class B nonconforming products. 5.4 Composition of inspection batch
Unit products are simply collected to form an inspection batch. The inspection batch can be the same or different from the production batch, sales batch, and transportation batch, but it should be composed of unit products of the same type, specification model, and basically the same process conditions and production time. The composition of the batch, the batch size, and the method of identifying the batch, etc., should be determined by negotiation between the manufacturer and the user. 5.5 Retrieval of sampling plan
In Table 1, the sampling plan is read from the intersection of pc and p. The value on the left side of the column is the sample size n, and the value on the right side is the acceptance number Ac. Note: ① According to the above inspection method, if the sample size exceeds the batch base, a gold number inspection should be carried out. ② When the batch size does not exceed 250, and the ratio of the sample size to the batch size is greater than 10%, the sampling plan retrieved from this standard is approximate and should be used with caution. It is recommended to determine the sampling plan according to the method specified in GB/T13264. Example 1: When the specified value is 1.05 (%) and the value is 3.00 (%), determine the sampling plan to be adopted. In Table 1, find (435, 8) in the intersection of the row where p is 1.05 (%) and the column where P1 is 3.00 (%). That is, the sampling plan with a sample size of 435 and an acceptance number of 8 is adopted. Example 2: When the specified value is 0.370 (%) + the order is 1.70 (%), determine the sampling plan to be adopted. From Table 1, find a row of 0.356 (%) ~ 0.400 (%) and a column of 1.61 (%) ~ 1.80 (%), and find (490, 4) in their intersection. That is, the sampling plan with a sample size of 490 and an acceptance number of 4 is adopted. 5.6 Sampling
The sample should be randomly selected from the entire batch, which can be done after the batch is formed or during the batch formation process. Note: There are many ways to randomly select samples. For example, sampling can be carried out according to the method specified in GI/T10111. 5.7 Inspection of samples
The samples are inspected one by one according to the tests, rat tests or other methods specified in the technical standards or relevant documents such as contracts to determine whether each unit product in the sample is qualified, and the total number of non-conforming products is accumulated. 5.8 Judgment criteria
According to the results of the sample inspection, if the number of non-conforming products found in the sample is less than or equal to the acceptance number, the batch is accepted; if the number of non-conforming products found in the sample is greater than the acceptance number, the batch is not accepted (the batch is considered to be non-conforming). 5.9 Disposal of inspection batches
The ordering party shall accept the batch judged to be accepted in its entirety and remove the non-conforming products in the sample; at the same time, the purchaser is allowed to propose certain additional conditions to the supplier on the basis of negotiation. If the batch has been accepted, the user has the right not to accept any non-conforming products found, regardless of whether the product constitutes part of the sample.
If there is any objection to the results of the sampling inspection, a re-inspection can be carried out. During the re-inspection, a full inspection can be carried out. The actual quality level of the batch can be obtained through the full inspection. When the actual quality level of the batch is inferior to the qualified quality level, the batch is an unqualified batch; when the actual quality level of the batch is better than the qualified quality level, the batch is a qualified batch.
6 Sampling plan table
See Table 1.
GB/T 13262—2008
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GB/T13262-2008
People's Republic of China
National Standard
Standard type for percentage of nonconforming products by counting
Single sampling inspection procedure and sampling table
GB/T13262—2008
Published by China Standards Press
No. 16, Sanlihebei Street, Fuxingmenwai, Beijing 5
Postal code: 100043
Website: spc. nel, en
Tel: 6852394668517548
Printed by Qinfudao Printing Factory of China Standard Press Distributed by Xinhua Bookstores in various places
Printing sheet 0.75 Word count 18,000 words
Format 880×12391/16
First revised printing in November 2008
First edition in November 2008
Book number: 155066·1-34553 Price: 14.00 yuan If there is any printing error, our distribution center will replace it. Copyright infringement will be investigated
Report telephone: (010) 68533533p1/%
GB/T13262-2008
People's Republic of China
National Standard
Standard for percentage of non-conforming products by counting
Single sampling inspection procedure and sampling table
GB/T13262—2008
Published by China Standards Press
No. 16 5, Sanlihebei Street, Fuxingmenwai, Beijing
Postal Code: 100043
Website spc. nel, en
Tel: 6852394668517548
Printed by Qinfudao Printing Factory of China Standard Press Distributed by Xinhua Bookstores in various places
Printing sheet 0.75 Word count 18,000 words
Format 880×12391/16
First revised printing in November 20C8
First edition in November 2008
Book number: 155066·1-34553 Price 14.00 yuan If there is any printing error, our distribution center will replace it. Copyright infringement will be investigated
Report telephone: (010) 68533533p1/%
GB/T13262-2008
People's Republic of China
National Standard
Standard for percentage of non-conforming products by counting
Single sampling inspection procedure and sampling table
GB/T13262—2008
Published by China Standards Press
No. 16 5, Sanlihebei Street, Fuxingmenwai, Beijing
Postal Code: 100043
Website spc. nel, en
Tel: 6852394668517548
Printed by Qinfudao Printing Factory of China Standard Press Distributed by Xinhua Bookstores in various places
Printing sheet 0.75 Word count 18,000 words
Format 880×12391/16
First revised printing in November 20C8
First edition in November 2008
Book number: 155066·1-34553 Price 14.00 yuan If there is any printing error, our distribution center will replace it. Copyright infringement will be investigated
Report telephone: (010) 68533533
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