Vietnam is where a great deal of German-designed equipment is now actually assembled. That single sentence explains most of the urgent traffic on this lane. A line in Bac Ninh or Binh Duong runs to a schedule set in Stuttgart or Sindelfingen, and when it stops, the part that restarts it is usually small, usually in Germany, and usually needed before the next shift rather than before the next week.
The second driver is qualification and pre-production. Tooling inserts, first articles, test boards, reference samples and approved colour standards move between a German engineering office and a Vietnamese plant constantly, and each of them is holding up a sign-off that other people are waiting on. These are the consignments where air freight's honest three-to-five days is three to five days too many.
The third is documentary. Powers of attorney, notarised corporate resolutions, original certificates of origin and legalised contracts still have to arrive as originals, and the legalisation chain runs through embassies and chambers with their own opening hours. A courier who is holding the folder can walk it from one counter to the next; a tracking number cannot.


