Web sites are typically complex and highly dynamic. They require short development phases in order to get the product up and running quickly. Frequently, developers go straight to the coding phase without really understanding what they are trying to build or how they want to build it. Server-side coding is often done ad hoc, database tables are added as needed, and the architecture evolves in a sometimes unintentional manner. But some modeling and disciplined software engineering can make the software development process much smoother and ensure that the Web system is more maintainable in the future.