A method for manufacturing a wing panel of an aircraft comprising: positioning a skin panel in a work area ; positioning a support structure on a surface of the skin panel ; and operating a plurality of groups of robots in parallel for attaching the support structure to the skin panel at a plurality of locations, and operating robots of each group of robots of the plurality of groups of robots in synchronism for attaching the support structure to the skin panel at a location of the plurality of locations, wherein the plurality of groups of robots comprises a plurality of pairs of robots , wherein a first robot of each pair of robots of the plurality of pairs of robots performs a first plurality of manufacturing operations on an upper surface of the skin panel , and a second robot of each pair of robots of the plurality of pairs of robots performs a second plurality of manufacturing operations on a lower surface of the skin panel , wherein the method further comprises: supporting the skin panel by a plurality of retractable support members; and positioning the second robots of each of the plurality of pairs of robots , wherein support members of the plurality of retractable support members are sequentially retracted to permit positioning of the second robots of each of the plurality of second robots , and the retracted support members are extended after the positioning of the second robots of each of the plurality of pairs of robots . positioning a skin panel in a work area ; positioning a support structure on a surface of the skin panel ; and operating a plurality of groups of robots in parallel for attaching the support structure to the skin panel at a plurality of locations, and operating robots of each group of robots of the plurality of groups of robots in synchronism for attaching the support structure to the skin panel at a location of the plurality of locations, wherein the plurality of groups of robots comprises a plurality of pairs of robots , wherein a first robot of each pair of robots of the plurality of pairs of robots performs a first plurality of manufacturing operations on an upper surface of the skin panel , and a second robot of each pair of robots of the plurality of pairs of robots performs a second plurality of manufacturing operations on a lower surface of the skin panel , wherein the method further comprises: supporting the skin panel by a plurality of retractable support members; and positioning the second robots of each of the plurality of pairs of robots , wherein support members of the plurality of retractable support members are sequentially retracted to permit positioning of the second robots of each of the plurality of second robots , and the retracted support members are extended after the positioning of the second robots of each of the plurality of pairs of robots . supporting the skin panel by a plurality of retractable support members; and positioning the second robots of each of the plurality of pairs of robots , wherein support members of the plurality of retractable support members are sequentially retracted to permit positioning of the second robots of each of the plurality of second robots , and the retracted support members are extended after the positioning of the second robots of each of the plurality of pairs of robots . <EOS>