- Usage or function of the article
- Articles that are used for the same function are grouped together. Examples are; Vehicles used for transportation are classified in Chapter 87 while Arms and ammunitions, parts and accessories thereof are used for defence (Chapter 97).
- Degree of processing or manufacture of an article
- Articles at the same stage of processing or Degree of manufacture are put together, for example
Article Chapter Stage of processing
Iron ore Chapter 26 Raw material
Iron bars Chapter 27 Semi – finished
Iron doors Chapter 73 Finished product