Nevertheless, people keep insisting that my contention of "the source code is the design" means "don’t do design, just code." I never said anything of the sort. What I did say was:
"In software engineering, we desperately need good design at all levels. In particular, we need good top level design. The better the early design, the easier detailed design will be. Designers should use anything that helps. Structure charts, Booch diagrams, state tables, PDL, etc.—if it helps, then use it."
Today, I would phrase it differently. I would say we need good architectures (top level design), good abstractions (class design), and good implementations (low level design). I would also say something about using UML diagrams or CRC cards to explore alternatives. Nevertheless, I will not back away from the following statement:
"We must keep in mind, however, that these tools and notations are not a software design. Eventually, we have to create the real software design, and it will be in some programming language. Therefore, we should not be afraid to code our designs as we derive them."
This is fundamental. I am not arguing that we should not "do design." However you want to approach the process, I simply insist that you have not completed the process until you have written and tested the code.