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             ___      ______   __   __    _____   
    ___     / _ \\   /_____//  \ \\/ //  /  ___|| 
   /   ||  / //\ \\  `____ `    \ ` //  | // __   
  | [] || |  ___  || /___//      | ||   | \\_\ || 
   \__ || |_||  |_|| `__ `       |_||    \____//  
    -|_|| `-`   `-`  /_//        `-`'     `---`   
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發送短信 : Design catalogs: a practical approach to design and value flexibility in engineering systems