Graeve, B.

product supply return chain logistic inventory model stock management process source order demand system value closed-loop supply chains channel service information market policy business product returns machine equipment design opportunity repair level company alternative recovery option operation fleischmann network decision component approach customer closed-loop issue coordination review analysis result procurement costs procurement future strategy van nunen figure testing cycle gr äve simulation model research stock levels production saving interface product flows project nunen reactive concern supply chains perspective repair channel interfaces vol supply chain example section point control situation target simulation inventory position channel design