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Origin of Six Sigma Manufacturing

Six Sigma is a manufacturing process control strategy which first implemented by Motorola.

Six sigma being common used by any sectors of industry nowadays, especially those precision product manufacturing.

Six Sigma manufacturing implemented to control the process or stabilize the process. Then, seeks to improve the quality of process outputs.

To stable or improve the process, six sigma manufacturing tools need to be used to achieve the target.

Six Sigma tools - statistical process control (SPC) 

 

  • How to detect abnormality
  • Below occur consider as process abnormality
  • - 1 point greater than 3 standard deviation from center line.
  • - 9 points in now on same side of center line
  • - 6 points in a row, all increasing or all decreasing
  • - 14 points in a row alternating up and down
  • - 2 out of 3 points greater than 2 standard deviation from center line
  • - 4 out of 5 points greater than 1 standard deviation from center line
  • - 15 points in a row within 1 standard deviation from center line
  • - 8 points in a row greater than 1 standard deviation from center line

 

  • What mean process abnormality and what activity shall be done to prevent defect?
  • Process abnormality occur mean the possibility to get defect is higher than the confident interval. So, checking and confirmation on the parameter shall be done before the defect happen. Fix the error before defect occur.
    • Statistical process control (SPC) request data collection time to time to monitoring the process consistency. The calculation and monitoring manually take time. To overcome this problem, there is a software call minitab can help. Minitab will analyse the result once the data was inputted

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