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  ______     ___      _____      ___      ______  
 /_   _//   / _ \\   |__  //    / _ \\   /_   _// 
   | ||    | / \ ||    / //    / //\ \\  `-| |,-  
  _| ||    | \_/ ||   / //__  |  ___  ||   | ||   
 /__//      \___//   /_____|| |_||  |_||   |_||   
 `--`       `---`    `-----`  `-`   `-`    `-`'

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發送短信 : Cumulative sum control charts for monitoring process mean and/or variance