³Ô¹Ïtv / SOLDERING ENGINEERINGFrom observation to a controlled next step01Preserve thehistory02Agree thedisposition03Control theoperation04Verify the repairedunitIf evidence is missing: retain the question and assign an owner.A calculation or completed checklist does not release the assembly.Task: BGA sphere-count planningExplanatory schematic. Not to scale, a process recipe, acceptance limit or inspection evidence.