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The Weights and Measures (Packaged Goods) Regulations 2006

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3.  CHECKING OF THE ACTUAL CONTENTS OF A PACKAGE

3.1 The minimum acceptable contents shall be calculated by subtracting the tolerable negative error for the contents concerned from the nominal quantity of the package.

3.2 Packages in the batch whose actual contents are less than the minimum acceptable contents shall be considered defective.

Single sampling plan for non-destructive testing

3.3 The number of packages checked shall be equal to the number in the sample, as indicated in the table below.

3.4 If the number of defective packages found in the sample is less than or equal to the acceptance criterion indicated in that table, the group shall be considered as acceptable for the purpose of the check.

3.5 If the number of defective packages found in the sample is equal to or greater than the rejection criterion there indicated, the group shall be rejected.

Number of defective packages
Number in groupNumber in sampleAcceptance criterionRejection criterion
100 to 5005034
501 to 3,2008056
3,201 and above12578

3.6 For a batch of fewer than 100 packages the batch shall be considered acceptable for the purposes of the check if the number of defective packages does not exceed 5%.

Double sampling plan for non-destructive testing

3.7 Non-destructive testing shall be carried out in accordance with a double sampling plan as shown in the table below.

3.8 The first number of packages checked shall be equal to the number of units in the first sample, as indicated in the plan.

3.9 If the number of defective units found in the first sample is less than or equal to the first acceptance criterion, the batch shall be considered acceptable for the purpose of this check.

3.10 If the number of defective units found in the first sample is equal to or greater than the first rejection criterion, the batch shall be rejected.

3.11 If the number of defective units found in the first sample lies between the first acceptance criterion and the first rejection criterion, a second sample shall be checked, the number of units in which is indicated in the plan. The defective units found in the first and second samples shall be added together and:

3.1.1if the aggregate number of defective units is less than or equal to the second acceptance criterion, the batch shall be considered acceptable for the purpose of this check,

3.1.2if the aggregate number of defective units is greater than or equal to the second rejection criterion, the batch shall be rejected.

SamplesNumber of defective units
Number in batchOrderNumberAggregate numberAcceptance criterionRejection criterion
100 to 50

1st

2nd

30

30

30

60

1

4

3

5

501 to 3,200

1st

2nd

50

50

50

100

2

6

5

7

3,201 and over

1st

2nd

80

80

80

160

3

8

7

9

Single sampling plan for destructive testing

3.12 Destructive testing shall be carried out in accordance with the single sampling plan below and shall be used only for batches of 100 or more.

3.13 The number of packages checked shall be equal to 20.

3.14 If the number of defective units found in the sample is less than or equal to the acceptance criterion, the batch of packages shall be considered as acceptable.

3.15 If the number of defective units found in the sample is equal to or greater than the rejection criterion, the batch of packages shall be rejected.

Number of defective packages
Number in batchNumber in sampleAcceptance criterionRejection criterion
Whatever the number (≥ 100)2012

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