This practical guide takes the theoretical concepts of structured design and makes them applicable to real-world software development. It also integrates the approach of structured analysis with that of structured design. The book also gives a brief outline of the tools of structured analysis and shows how these tools are an asset not only to the analyst, but also to the designer of a computer system.
Although the illustrations are quite dated, this is still a great introduction to important ways of thinking about the relationships between program components (these days, we would say "objects"). Considering the renewed interest in refactoring, brought on by the Agile processes, a little back-to-basics study on "what makes a good boundary definition" is eminently useful.
The first 3rd contains timeless knowledge about information systems communicated clearly and usefully, the last 2 3rds is mostly a walk down memory lane about ancient boomer technology that is interesting to develop a historical in understanding of system design but is not very practical today. A forgotten gem!