Soldering
Soldering is the foundational join technique for electrical and electronic assemblies — used to attach components to PCBs, terminate sensor wires, repair instrumentation, and rework prototype BMS boards. As a hard skill it requires temperature and tip selection appropriate to the joint, wetting and dewetting recognition, and the IPC-A-610 visual standards for acceptable vs defective joints (through-hole, surface mount, BGA rework). Technicians apply it during prototype board bring-up, in-field repair of damaged sensor cables, and rework of small-quantity BMS boards where pulling a contract manufacturer in for a single rework would cost too much.