$5\mathrm{.}2\mathrm{.}1$: Discovery.

Our business has a number of factories. Each factory has a name and an address. Each factory makes several products. Each product has a product ID$,$ name, and description. Many kinds of parts are used in manufacturing each product. Each kind of part is identified by number. Each part has a bin number indicating where the part is stored.

What are the relationships?The entities are Factory, Product, and Part.