CAC_GL 50-2004 GENERAL GUIDELINES ON SAMPLING
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ID： |
4F3D84CFA346451FBB421EF8F5C8A17C |
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文件大小(MB)： |
0.45 |
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页数： |
69 |
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文件格式： |
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日期： |
2006-7-3 |
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文本摘录（文本识别可能有误，但文件阅览显示及打印正常，pdf文件可进行文字搜索定位）：
CAC/GL 50-2004 Page 1 of 69,GENERAL GUIDELINES ON SAMPLING,CAC/GL 50-2004,TABLE OF CONTENTS,TABLE OF CONTENTS 1,PREAMBLE .. 3,SECTION I. PURPOSE OF CODEX GUIDELINES ON SAMPLING 5,1.1 PURPOSE .. 5,1.2 TARGET AUDIENCE OF THE GUIDELINES. 5,1.3 USERS OF SAMPLING PLANS RECOMMENDED BY THE GUIDELINES. 5,1.4 SCOPE OF THE GUIDELINES . 6,1.5 RELATIONSHIP OF THE GUIDELINES WITH THE ISO GENERAL STANDARDS 8,SECTION 2. MAIN NOTIONS OF SAMPLING.. 8,2.1 INTRODUCTION . 8,2.1.1 Presentation of the section 8,2.1.2 General .. 9,2.2 COMMONLY USED TERMS AND NOTIONS.. 10,2.2.1 Lot.. 10,2.2.2 Consignment . 10,2.2.3 Sample (representative sample) 10,2.2.4 Sampling . 11,2.2.5 Total estimation error.. 11,2.2.6 Sampling error. 11,Item or increment of individualisable goods .. 11,2.2.8 Sampling plan .. 11,2.2.9 The Characteristic . 12,2.2.10 Homogeneity 12,2.2.11 Defects (Nonconformities) and Critical Nonconformities. 12,2.2.12 Operating Characteristic Curve. 13,2.2.13 Producers’ risk and consumers’ risk 13,2.2.14 The Acceptable Quality Level (AQL) and Limiting Quality (LQ) Level. 14,2.2.15 Responsible Authority. 15,2.2.16 Inspection Levels and Switching Rules 15,2.2.17 Acceptance Number. 15,Lot Size and Sample Size . 15,2.3 SAMPLING PROCEDURES 16,2.3.2 Employment of Sampling Officers .. 16,2.3.3 Material to be Sampled 16,Representative sampling .. 16,2.3.5 Preparation of samples 17,Packaging and Transmission of Laboratory Samples 18,2.3.7 Sampling reports. 18,2.4 ESTIMATION ERRORS 18,2.5 TYPES OF SINGLE SAMPLING PLANS 19,2.5.1 Single sampling plans for inspections of percent non-conforming items 19,2.5.2 Zero Acceptance Number Sampling Plans . 28,2.5.3 Sampling plans for inspection of critical nonconformities . 28,2.6 COST OF SAMPLING .. 29,SECTION 3: THE SELECTION OF SAMPLING PLANS FOR SINGLE OR ISOLATED LOTS MOVING,IN INTERNATIONAL TRADE.. 29,3.1 SAMPLING PROCEDURES FOR INSPECTION BY ATTRIBUTES: SAMPLING PLANS INDEXED BY LIMITING QUALITY,(LQ) FOR ISOLATED LOT INSPECTION . 29,CAC/GL 50-2004 Page 2 of 69,3.1.1 Procedure A: Producer and consumer regard lot in isolation 30,3.1.2 Procedure B: Producer regards lot as one of a continuing series: Consumer regards lot in isolation.. 30,3.2 TWO AND THREE CLASS ATTRIBUTES PLANS FOR MICROBIOLOGICAL ASSESSMENTS (SEE REFERENCE 6.1) 31,3.2.1 Two-class Attributes Plans . 31,3.2.2 Three-class Attributes Plans.. 32,The Application of Two and Three-class Attributes Plans .. 33,3.3 SINGLE SAMPLING PLANS FOR AVERAGE CONTROL (STANDARD DEVIATION UNKNOWN). 34,SECTION 4. THE SELECTION OF SAMPLING PLANS FOR A CONTINUOUS SERIES OF LOTS,FROM A SINGLE SOURCE 35,4.1 PRESENTATION OF SECTION 4 .. 35,4.2 SINGLE SAMPLING PLANS RECOMMENDED FOR INSPECTION OF DEFECTIVE PERCENTAGE BY ATTRIBUTES (FROM,ISO 2859-1 : 1989) 38,4.2.1 General 38,4.2.2 Recommended plans by attributes .. 39,4.3 SINGLE SAMPLING PLANS FOR INSPECTION BY VARIABLES FOR PER CENT NONCONFORMING. 45,4.3.1 General 45,4.3.2 Recommended sampling plans by variables : s method .. 46,TABLE 14: VARIABLE SAMPLING PLANS WITH UNKNOWN STANDARD DEVIATION 47,4.3.3 Recommended sampling plans by variables: σ-method .. 53,TABLE 17. VARIABLE SAMPLING PLANS WITH KNOWN STANDARD DEVIATION.. 54,4.3.4 Rules and procedures of switching between inspection levels.. 63,4.4 SINGLE SAMPLING PLANS FOR AVERAGE CONTROL . 63,4.4.1 Unknown standard deviation. 63,4.4.2 Known standard deviation.. 65,SECTION 5. THE SELECTION OF SAMPLING PLANS FOR THE INSPECTION BY VARIABLES OF,BULK MATERIALS: KNOWN STANDARD DEVIATION .. 66,5.1 GENERAL .. 66,5.2 STANDARDISED SAMPLING PROCEDURES FOR THE INSPECTION OF INDIVIDUAL LOTS 67,SECTION 6. REFERENCES. 69,CAC/GL 50-2004 Page 3 of 69,GENERAL GUIDELINES ON SAMPLING,PREAMBLE,RATIONALE,Codex Food Standards are aimed at protecting consumers’ health and ensuring fair practices in the food,trade.,Codex Methods of Sampling are designed to ensure that fair and valid sampling procedures are used when,food is being tested for compliance with a particular Codex commodity standard. The sampling methods are,intended for use as international methods designed to avoid or remove difficulties which may be created by,diverging legal, administrative and technical approaches to sampling and by diverging interpretation of,results of analysis in relation to lots or consignments of foods, in the light of the relevant provision(s) of the,applicable Codex standard.,The present guidelines have been elaborated to facilitate the implementation of these goals by Codex,Commodity Committees, governments and other users.,BASIC RECOMMENDATIONS FOR THE SELECTION OF CODEX SAMPLING PLANS,The present clause represents a pre-requisite to the use……
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