Trying to Normalize tables to 2NF and 3NF

Question

I have this dependency diagram I'm trying to make into 2NF and then 3NF. I'm not sure if I'm doing it right:

Here's the dependency:

This is how I tried to model it:

Answer 1

If I understand the diagram correctly, your "1b" is the right decomposition. All the tables in "1b" are in at least 5NF, though.

The notion that you can normalize to 2NF and no higher, or to 3NF and no higher, is a common misunderstanding of how normalization works. It's quite common to start with a relation that's in 1NF, and in a single step end up with all the relations in 5NF.