This document provides an overview of when to use a framework versus integrating existing products. It discusses the developer's choice between frameworks and integrated products. Frameworks like Symfony are designed as development platforms and provide more flexibility, while integrated products aim to be usable out of the box but have less flexibility. The document also provides examples of how to integrate Symfony within other products, such as by including Symfony routing rules that direct to an integrated product. It describes how a basic content management system could be developed within Symfony in just one day.