Abstract： AS 1085.18:2003 pdf download.Railway track material Part 18: Screw spikes and threaded inserts. B2 STATISTICAL SA1PLINC Statistical sampling is a procedure that enables decisions to he made about the quality of batches of items after inspec...

AS 1085.18:2003 pdf download.Railway track material Part 18: Screw spikes and threaded inserts.

B2 STATISTICAL SA1PLINC

Statistical sampling is a procedure that enables decisions to he made about the quality of batches of items after inspecting or

testing only a portion of those items. •Fhis 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 froni knon materials at essentially the same time, by essentially the same processes and under essentialk 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 l99, guidance to which is given in AS 1399.

The purpose of product certification is to provide independent assurance of the claim by the manufacturer that products comply with the stated Standard.

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