³Ô¹Ïtv / SOLDERING ENGINEERINGFrom observation to a controlled next step01Identify locations02Record the trace03Review actuallimits04Approve a processrecordIf evidence is missing: retain the question and assign an owner.A calculation or completed checklist does not release the assembly.Task: Relative BGA separation changeExplanatory schematic. Not to scale, a process recipe, acceptance limit or inspection evidence.