Korea runs two industries where a day is a very expensive unit of time: semiconductors and batteries. Both are capital-intensive to the point where an idle line is measured in money per hour, and both depend on European equipment, European materials and European metrology. When a part is needed, it is needed on the next flight, and the customer usually knows exactly what that costs.
The battery relationship in particular has become a German, Korean one in both directions: Korean cells and Korean process equipment going west, German automotive qualification requirements and test material going east. The consignments are small, often regulated, and almost always attached to a sign-off that other people are waiting on.
Shipbuilding in Busan adds a third strand. A vessel waiting on a certified spare is the marine equivalent of an aircraft on ground, and the paperwork, class certificates, material certificates, originals, matters as much as the part.


