Sizing up today´s lightweight software processes

There is a buzz about the new lightweight software development processes. These processes are certainly capable of creating successful software systems faster. As a software developer, which one should you choose for your project? Indeed, today´s software development processes bring interesting dynamics to the projects to which developers apply them. But should process drive the project or should the project determine the process? I examine one characteristic of these processes, scalability, which can help you decide what process is best for you