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

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