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What is called the stratification of information?

(a) Breaking down a whole group into smaller sub groups

(b) Isolating the vital few from the trivial many

(c) Grouping of scattered information

(d) Sequencing of processes in a quality system

The question was posed to me during an online exam.

The above asked question is from Tools and Techniques of TQM in portion Measuring Machines & Total Quality Management of Engineering Metrology

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The correct option is (a) Breaking down a whole group into smaller sub groups

The best I can explain: Stratification of information is one of the statistical tools which means breaking down of the whole group into smaller sub-groups. Run charts, effect diagram, pareto diagram and scatter diagrams are also the statistical tools.

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