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

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Text this: A mathematical model used in flow lines for performance measurement and system improvement