Systems built by unsupervised intermediate developers are going to fail for completely different reasons than systems built by juniors. A junior will build a big pile of algorithms that sort of work. A good intermediate will build pages out of “Design Patterns” and “Domain Driven Design”. While those are great books for learning how to build large OO systems, direct application of this sort of theory results in over engineered systems that are flexible in ways that don’t matter, and inflexible in ones that do matter-- (c) Matt Briggs