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Harini V

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  • Harini V replied to the topic Control Limits in the forum Software/IT 17 years, 1 month ago

    Please refer to the book by Donald Wheeler “Understanding Variation – The key to manageing Chaos”.
    For IMR charts, with adjacent values, n=2, the k value becomes 2.66, which is nothing but 3/Hartley’s constant. Replacing Harley’s constant (1.128) for n=2 will give 2.66