The place and method of manufacture determines the origin of goods. So you’d expect determining the origin to be a fairly simple thing to do. Nothing could be further from the truth!
Finished goods consist of parts that were all manufactured in different countries. Suddenly a simple cupboard becomes a complex product in terms of determination of origin and the raw material, with a semi-finished product being more for the production process of a chemical product, while a cupboard is just screws, shelves and doors.