Designing the OU Structure

My local library in Kingston has a collection of nearly 10,000 books. These books cover many different subjects. When I walk into the library, I can see that there are signs hanging from the ceiling to guide you to the different book sections, such as novels, politics, arts, technology, cooking, and so on. So, if you know the type of the book you looking for, you can easily go to the relevant section. Most of the time, I end up in the cooking or history sections. Each of these sections has multiple bookshelves. These bookshelves are further categorized into subcategories. At the top of each bookshelf, there is a sign to describe which subcategory it belongs to. As an example, the history section has bookshelves with categories such as Europe History, Asia History, World History, and so on. This makes book selection even easier, as now you know exactly...