Key points in this article
Prove The Handoff First
A fault touches billing, notification, and repair, not just the charger. Change one link without testing the next and the problem migrates. Pilot the whole chain on a small case before altering the flow, because the break will appear at the seam you did not think about.
Map The Links
Name where the fault hands off: who tells the user, who logs it, who closes it. These seams are where faults leak into neighbouring steps. A clear map keeps each handoff accountable instead of dissolving into a vague sense that someone must have handled it.
Document The Links
Dongshang New Energy documents the fault chain so a break in one step is caught at the next, not discovered by an unhappy user days later when the trail has gone cold and nobody recalls whose turn it was.
A fault is rarely alone; it is a traveller across steps. Map its route, pilot the changes, and document the links, and it stays contained; leave the seams unnamed, and it becomes everyone's problem and nobody's responsibility.