Any ideas on making my current structure HIGHLY COHESIVE and LOOSELY COUPLED?

Hi there,

I am sharing a class diagram of my, can somebody help me in making the structure highly Cohesive and loosely Couples, please?

Below is a diagram

I would really appreciate if someone took time to view diagram and provide me any tips on making the structure highly cohesive and loosely coupled. Thanks in advanced.

The concepts of “Cohesion” and “Coupling” are intended to apply to the processing features of your system. It doesn’t make sense to try to apply those attributes to a relational database.

When you’re talking about a relational database schema design, your key initial objective is that your tables are appropriately normalized.