發送短信 : The demerit-based control chart for trinomial distribution

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