• RulersDownload .TXT file Open in Data Desk ?Link
  • Methods: Quality Control
  • Source: invented
  • Number of Cases: 24
  • Story:

    A company that traditionally made rulers and
    yardsticks is setting up a manufacturing process to make
    metersticks. Obviously, accuracy is important for their new
    product. The company runs a 24-hour production process.
    Using a calibration set of data they found:
    X = 1.000
    R = 0.0016
    They took a sample of 3 metersticks each hour and recorded
    the results.


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