Federal DemocraticRepublic of Ethiopia

≠ EDICT OF GOVERNMENT ±In order to promote public education and public safety, equal justice for all, a better informed citizenry, the rule of law, world trade and world peace, this legal document is hereby made available on a noncommercial basis, as it is the right of all humans to know and speak the laws that govern them.

ET ISO 5538 (2012) (English): Milk andmilk products - Sampling - Inspection byattributes

©ESA

Milk and milk products Sampling Inspection by attributes

 

A  full  stop  (.)  shall  substitute  comma  (,)  as  decimal  marker.

 

ETHIOPIAN STANDARD ES ISO 5538:2012

1

Milk and milk products Sampling Inspection by attributes

1 Scope

1.1

1.2

1.3

1.4

2 Normative references

Sampling procedures for inspection by attributes Part 1: Sampling schemes indexed by acceptance quality limit (AQL) for lot-by-lot inspection

Statistics Vocabulary and symbols Part 1: Probability and general statistical terms

Statistics Vocabulary and symbols Part 2: Applied statistics

3 Terms and definitions

3.1 acceptance quality limit AQL

©ESA

ES ISO 5538:2012

2

4 Sampling plans

5 Selection of sampling plan

5.1 Classification of defects

5.1.1 General

5.1.2 Critical defect

5.1.3 Major defect

5.1.4 Minor defect

©ESA

ES ISO 5538:2012

3

5.2 Choice of inspection level and AQL

5.2.1

n

n

5.2.2

n

©ESA

ES ISO 5538:2012

4

6 Records

7 Selection of units

Table 1 Inspection Level I AQL = 2,5 %

Lot size Normal inspection Tightened inspection Reduced inspection

n n n

Table 2 Inspection Level I AQL = 4,0 %

Lot size Normal inspection Tightened inspection Reduced inspection

n n n

©ESA

ES ISO 5538:2012

5

Table 3 Inspection Level I AQL = 6,5 %

Lot size Normal inspection Tightened inspection Reduced inspection

n n n

Table 4 Inspection Level I AQL = 10 %

Lot size Normal inspection Tightened inspection Reduced inspection

n n n

Table 5 Inspection Level S-4 AQL = 2,5 %

Lot size Normal inspection Tightened inspection Reduced inspection

n n n

©ESA

ES ISO 5538:2012

6

Table 6 Inspection Level S-4 AQL = 4,0 %

Lot size Normal inspection Tightened inspection Reduced inspection

n n n

Table 7 Inspection Level S-4 AQL = 6,5 %

Lot size Normal inspection Tightened inspection Reduced inspection

n n n

Table 8 Inspection Level S-4 AQL = 10 %

Lot size Normal inspection Tightened inspection Reduced inspection

n n n

©ESA

ES ISO 5538:2012

7

Table 9 Inspection Level S-3 AQL = 2,5 %

Lot size Normal inspection Tightened inspection Reduced inspection

n n n

Table 10 Inspection Level S-3 AQL = 4,0 %

Lot size Normal inspection Tightened inspection Reduced inspection

n n n

Table 11 Inspection Level S-3 AQL = 6,5 %

Lot size Normal inspection Tightened inspection Reduced inspection

n n n

Table 12 Inspection Level S-3 AQL = 10 %

Lot size Normal inspection Tightened inspection Reduced inspection

n n n

©ESA

ES ISO 5538:2012

8

Table 13 Inspection Level S-2 AQL = 2,5 %

Lot size Normal inspection Tightened inspection Reduced inspection

n n n

Table 14 Inspection Level S-2 AQL = 4,0 %

Lot size Normal inspection Tightened inspection Reduced inspection

n n n

Table 15 Inspection Level S-2 AQL = 6,5 %

Lot size Normal inspection Tightened inspection Reduced inspection

n n n

Table 16 Inspection Level S-2 AQL = 10 %

Lot size Normal inspection Tightened inspection Reduced inspection

n n n

Table 17 Inspection Level S-1 AQL = 2,5 %

Lot size Normal inspection Tightened inspection Reduced inspection

n n n

©ESA

ES ISO 5538:2012

9

Table 18 Inspection Level S-1 AQL = 4,0 %

Lot size Normal inspection Tightened inspection Reduced inspection

n n n

Table 19 Inspection Level S-1 = AQL = 6,5 %

Lot size Normal inspection Tightened inspection Reduced inspection

n n n

Table 20 Inspection Level S-1 AQL = 10 %

Lot size Normal inspection Tightened inspection Reduced inspection

n n n

Table 21 Single sampling plans at AQL = 2,5 %

n Lot size (units) for inspection levels shown

S-1 S-2 S-3 S-4 I

©ESA

ES ISO 5538:2012

10

Table 22 Single sampling plans at AQL = 4,0 %

n Lot size (units) for inspection levels shown

S-1 S-2 S-3 S-4 I

Table 23 Single sampling plans at AQL = 6,5 %

n Lot size (units) for inspection levels shown

S-1 S-2 S-3 S-4 I

Table 24 Single sampling plans at AQL = 10 %

n Lot size (units) for inspection levels shown S-1 S-2 S-3 S-4 I

©ESA

ES ISO 5538:2012

11

Annex A

Statistical theory

A.1

A.2

©ESA

ES ISO 5538:2012

12

Annex B

Critical defects

is likelya major

FnD

©ESA

ES ISO 5538:2012

13

n

F

D

F

Risk Factor

The acceptance number is, of course, always zero in this context

n

©ESA

ES ISO 5538:2012

14

Annex C

Drawing of samples

©ESA

ES ISO 5538:2012

15 ©ESA

ES ISO 5538:2012

16

Table C.1 Random sampling numbers

©ESA

ES ISO 5538:2012

17

Table C.2 Random sampling numbers

©ESA

ES ISO 5538:2012

18

Table C.3 Random sampling numbers

©ESA

ES ISO 5538:2012

19

Table C.4 Random sampling numbers

©ESA

ES ISO 5538:2012

20

Bibliography

Milk and milk products Guidance on sampling

©ESA

   The  Head  Office  of  ESA  is  at  Addis  Ababa.    

 011-­‐  646  06  85,  011-­‐  646  05  65    011-­‐646  08  80  2310  Addis  Ababa,  Ethiopia  

E-­‐mail:  info@ethiostandards.org,    Website:  www.ethiostandards.org  

Organization and Objectives

The Ethiopian Standards Agency (ESA) is the national standards body of Ethiopia established in 2010 based on regulation No. 193/2010.ESA is established due to the restructuring of Quality and Standards Authority of Ethiopia (QSAE) which was established in 1970.

ESA’s objectives are:-

Develop Ethiopian standards and establish a system that enable to check weather goods and services are in compliance with the required standards, Facilitate the country’s technology transfer through the use of standards, Develop national standards for local products and services so as to make them competitive in the international market.

Ethiopian Standards

The Ethiopian Standards are developed by national technical committees which are composed of different stakeholders consisting of educational Institutions, research institutes, government organizations, certification, inspection, and testing organizations, regulatory bodies, consumer association etc. The requirements and/ or recommendations contained in Ethiopian Standards are consensus based that reflects the interest of the TC representatives and also of comments received from the public and other sources. Ethiopian Standards are approved by the National Standardization Council and are kept under continuous review after publication and updated regularly to take account of latest scientific and technological changes. Orders for all Ethiopian Standards, International Standard and ASTM standards, including electronic versions, should be addressed to the Documentation and Publication Team at the Head office and Branch (Liaisons) offices. A catalogue of Ethiopian Standards is also available freely and can be accessed in from our website.

ESA has the copyright of all its publications. No part of these publications may be reproduced in any form without the prior permission in writing of ESA. International Involvement ESA, representing Ethiopia, is a member of the International Organization for Standardization (ISO), and Codex Alimentarius Commission (CODEX). It also maintains close working relations with the international Electro-technical Commission (IEC) and American Society for Testing and Materials (ASTM).It is a founding member of the African Regional Organization for standardization (ARSO).

More Information?

Contact us at the following address.

                       

       

    Standard  Mark                

 

                                                                                                                                     

                                                                                                                                                 

 

Eth

iopi

an S

tand

ards

Age

ncy