Statistical Sampling

Statistical Sampling is picking up a few samples out of the lot to see if the requirements are meeting are not. For example, if there are millions of water bottles that are coming out of production, one can’t test all the pieces. Only a few pieces out of every batch can be inspected. If those pieces are meeting the specifications then we can all is well otherwise we can take the decision of rejecting the entire lot. The sampling size and the frequency should be determined during the planning itself so that one can determine the cost of quality required for testing and rework or expected wastages.

Statistical Sampling technique is used under the process Plan Quality Management and Control Quality.