On the transformation from a fragment-based design into a module-based implementation

The software process is characterized as a transformation from a need to a software product that responds to that need. An application development environment is described that manages this process. It builds a conceptual model for the desired response (in the form of a fragment-based design) and automatically generates commercial-grade, module-based programs that implement the response. A decade of experience with a large application demonstrates the viability of this approach. Some observations on the software process are made