Is the relationship between Customer and Commodity correct?

Question

It is known about each employee of the shipping company what their first and last names are, their age, residence address, place of birth, correspondence address, e-mail.

Each employee who is a driver has one of the cars at the disposal. It is known about the car what make it is, what engine it has, when it was manufactured, etc.

Each car has a vehicle card, which contains information on failures, services, repairs, etc.

Shipping company has its customers and gathers the following information about them: first and last names, address, telephone no.

Customers commission the company the shipping of commodities. About commodities the following information is known: quantity, weight, address and date of shipping.

Customer can commission the shipping of more than one commodity. It is also known what the price of such a service is.

Please, review this ER Diagram that I have designed.

I have used "Look Across" Min-Max notation.

Answer 1

I would slightly change the diagram to display the shipping order as an entity (currently in your diagram it's displayed as a relation), with the following :

1. Each customer can have many shipping orders.
2. Each shipping order can contain many commodities.

Hope this helps