Norden, L. van

period problem transportation costs transportation pallet product lagrangean solution inventory algorithm model freight rate pallets instance research demand number van norden freight contract journal period t value european lot-sizing product j logistics service provider logistic cplex 3- partition constraint order velde norden capacity 127–138 fi xed european journal palletlotsize subproblem time period t wagner –whitin model lagrangean relaxation algorithm yn-pl relaxation reservation performance solution value lagrangean heuristic p units management integer heuristic wagner partition variable volume table section fferent parameter warehouse sense speranza lot-sizing models lagrangean algorithm service fi rst horizon provider fi nding np-hard planning strategy bertazzi yes-instance bound decision result iteration k price