7023 OSI International Standard Packaging - Sacks Method of sampling empty sacks for testing Emballages - Sacs - Methode d'échantillonnage de sacs vides pour essais First edition - 1983-02-15 UDC 621.798.15 : 676.821 : 620.11 Ref. No. ISO 7023-1983 (E) O 7023-1983 (E) Descriptors : packages, bags, sampling. Price based on 2 pages Copyright International Organization for Standardization without license from IHS Not for Resale Foreword IsO (the International Organization for Standardization) is a worldwide federation of national standards bodies (IsO member bodies). The work of developing International interested in a subject for which a technical committee has been authorized has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with IsO, also take part in the work. Draft International Standards adopted by the technical committees are circulated to the member bodies for approval before their acceptance as International Standards by the IsO Council. International Standard ISO 7023 was developed by Technical Committee ISO/TC 122, Packaging, and was circulated to the member bodies in February 1982. Australia Germany, F. R. South Africa, Rep. of Austria India Spain Belgium Ireland Sweden Brazil Israel Turkey Canada Italy United Kingdom Denmark USSR Japan Egypt, Arab Rep. of Malaysia Yugoslavia Finland Netherlands France Romania No member body expressed disapproval of the document. @ International Organization for Standardization, 1983 Printed in Switzerland d without license from IHS Not for Resale ISO 7023-1983 (E) INTERNATIONAL STANDARD Packaging - Sacks - Method of sampling empty sacks for testing Scope and field of application 3.4 sample : A specified number of sacks selected accor- ding to a prescribed procedure to represent the lot. This International Standard specifies a method of obtaining a representative sample of empty sacks for testing. 3.5 selected at random : Taken in such a way that each part of the whole has an equal chance of being selected. This International Standard is applicable when sampling in order to assess the average quality of a consignment of empty sacks. The method is not suited to sampling for production Principle 4 control. Selection at random of a prescribed number of sacks from the The method applies to all types of empty sacks. lot following a two-stage procedure as follows : NOTE -- It shouid be noted that the sample is representative only of Selection of a prescribed number of units from the lot those sacks available for sampling. Considerable caution should be ex- a) (see 5.1). consignment. b) Use of one of the following two procedures : 2 References 1) . Where the unit is not subdivided into elements, selection of a prescribed number of sacks from each of Iso 186, Paper and board -- Sampling for testing. these units (see 5.2.1). ISo 3951, Sampling ,procedures and charts for inspection by 2) Where the unit is subdivided into elements, selec- variables for percent defective. tion of a prescribed number of elements from each of these units, then selection of a prescribed number of sacks from these elements (see 5.2.2). Definitions For the purpose of this International Standard, the following Procedure 5 definitions apply. 5.1 Selection of units 3.1 lot : The aggregate of sacks which are of a single kind with specified characteristics, on which a judgement is desired Determine and select the number of units to be sampled, accor- (usually as to compliance with specification) and which are ding to table 1. available for sampling. NOTE -- Table 1 has been taken from ISO 186. NOTES Table 1 1 The number of sacks comprising a lot may be indicated on the in- voice or agreed upon by the contracting parties. Number of units (n) Number of units Method of 2 When the number of sacks availabie for sampling is less than the lot in the lot selected selection size agreed or indicated on the invoice, the total number of sacks 1 to 5 all