Structured analysis, structured design, visual programming

The paper proposes a visual programming methodology based on the formalised dataflow diagram language PrM. The resulting approach seamlessly integrates all phases of information system development from early analysis to final implementation because the same visual language is applied throughout. The paper describes the PrM language and discusses visual programming in PrM based on menu selection of predefined graphical templates. The possibility of user-specified template types is considered. Generation of production code from visual PrM programs is explained, as well as prototype generation from unfinished specifications. The PrM language has been implemented, and the practicality of the proposed methodology is discussed in relation to this CASE tool