I don't know whether this is a "beaten to death" topic or not. I am confused with the cade's class diagram. The navigability between creditcard and customer is from creditcard->customer. I suppose it should be in the other way. You can reach creditcard only through customer.
But if we do it in either way, it will only create more confusion, especially when the more and more classes are added to it.
The same problem happens with the relationship between ProductCategories and Product. It should be ProductCategories -> Product (each productcategories can containmultiple products)
Also, the many-to-many relationship between productcategories and product in the class diagram is violating the BDOM which shows one-to-many relationship between productcategories and product .. each product belongs to ONLY ONE productcategory
Am I missing something, or confusing myself ???
Please guys, your thought on this one much appreciated !!!