Solution : https://service.sap.com/sap/support/notes/676776 (SAP Service marketplace login required)
Key words :
co_assembly_level_tab optional indicator = active important information, manually add changing parameter ct_assembly_level, ppc development class/package, baust type resbd-baust, bauwg type resbd-bauwg, co_assembly_level_tab type sorted table, call user exit exit_saplcomk_014, unique key baust bauwg, ct_assembly_level type spec, function module co_it_dum_ass_upd
Related Notes :
708809 | Incorrect component quantities when changing scrap |