Now that you have a basic understanding of the site design, let's move on to developing use cases, creating object models, and creating a database schema. This will be covered next in Chapter 5, “Developing ERDs and Use Cases.”
The Books for Geeks FRD was on the light side of the continuum, made up of several wireframes and a high-level description of the site functionality. FRDs can be much more complicated than this. The more detailed an FRD is, the more secure you can be in your time estimates and risk assessment of a project because less during the development process is left for last-minute discovery.