Engineers at the company's manufacturing, quality control, acting one Harddisk to test a Bearing from a Supplier to selected five companies that the Bearing from the company (Brand) which, when incorporated into a series. Motor and vibration (Vibration), because the most important factor of quality, vibration or Noise is the Harddisk while you work your Harddisk, he designed the experiment by sampling the motor comes with 30 characters and is divided into 5 groups of 6 each, one for each group, it is used with the sample from the company Bearing the same. When attached to the motor and start working. He has made the vibration measurement of the motor and get the table, make a test that all five companies from the Bearing (Brand), different vibration or not.
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