This　paper　describes　the　extended　quality　function　deployment　(QFD)　in　life　cycle　design　(LCD)　based　on　the　traditional　QFD　which　is　often　used　at　the　requirement　analysis　stage.　By　investigating　QFD　in　the　product　life　cycle　design,　the　extended　QFD　is　proposed　with　the　theoretical　frame.　The　extension　begins　with　the　analysis　of　requirement　by　adding　environment　and　cost　factors,　instead　of　only　customer　requirements,　as　the　input　of　the　1st　level　house　of　quality　(HoQ).　Accordingly,　multi-target　values　are　built　in.　In　a　sequential　process　of　the　LCD,　the　extension　carries　out　requirement　deployment,　function　deployment,　equipment　deployment,　part　deployment,　cost　deployment　and　reliability　deployment.　Finally,　this　paper　reveals　how　to　apply　the　extended　QFD　in　LCD　and　how　to　choose　and　adjust　HoQ　for　different　products.　©　Springer-Verlag　Berlin　Heidelberg　2007.