أرسل هذا في رسالة قصيرة: A mathematical model used in flow lines for performance measurement and system improvement

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