Did you Know...
A series of smaller more frequent checks is better than a larger check at beginning and end of production run. Sampling of the batch will never indicate that the batch is free from defects. All that sampling will allow is that it will give a level of confidence that the batch is acceptable.
For example, it is necessary to test 300 containers to be sure of finding a defect level of 1 in 100. Similarly it will be necessary to test up to 30,000 containers to find a defect level of 1 in 10,000. Statistically this will equate to a confidence level of 95%. On thermoforming and traysealing machines it is recommended to test a full cycle to find any tooling defects.
Table shows the percentage of tested products at a certain packaging speed and random test frequence. |
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