AS 3705:2003 Geotextiles—Identification, marking and general data
A2 STATISTICAL SAMPLING
Statistical sampling is a procedure which enables decisions to be made about the quality of batches of items after inspecting or testing only a portion of those items. This procedure will only be valid if the sampling plan has been determined on a statistical basis and the following requirements are met:
(a) The sample needs to be drawn randomly from a population of product of known history. The history needs to enable verification that the product was made from known materials at essentially the same time, by essentially the same processes and under essentially the same system of control.
(b) For each different situation, a suitable sampling plan needs to be defined. A sampling plan for one manufacturer of given capability and product throughput may not be relevant to another manufacturer producing the same items. In order for statistical sampling to be meaningful to the customer, the manufacturer or supplier needs to demonstrate how the above conditions have been satisfied. Sampling and the establishment of a sampling plan should be carried out in accordance with AS 1199.1, guidance to which is given in AS 1199.0.
A3 PRODUCT CERTIFICATION
The purpose of product certification is to provide independent assurance of the claim by the manufacturer that products comply with the stated Standard.
The certification scheme should meet the criteria described in HB 18.28 in that, as well as full type testing from independently sampled production and subsequent verification of conformance, it requires the manufacturer to maintain effective quality planning to control production.
The certification scheme serves to indicate that the products consistently conform to the requirements of the Standard.
A4 SUPPLIER’S QUALITY MANAGEMENT SYSTEM
Where the manufacturer or supplier can demonstrate an audited and registered quality management system complying with the requirements of the appropriate or stipulated Australian or international Standard for a supplier’s quality management system or systems, this may provide the necessary confidence that the specified requirements will be met.