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 __   _      ___      _____      ___     __   _   
| || | ||   / _ \\   / ____||   / _ \\  | || | || 
| '--' ||  | / \ || / //---`'  / //\ \\ | '--' || 
| .--. ||  | \_/ || \ \\___   |  ___  ||| .--. || 
|_|| |_||   \___//   \_____|| |_||  |_|||_|| |_|| 
`-`  `-`    `---`     `----`  `-`   `-` `-`  `-`

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