Question 554 – Software-Engineering

A Warnier/Orr diagram (also known as a logical construction of a program/system) is a kind of hierarchical flow chart that allows the description of the organization of data and procedures.
This method aids the design of program structures by identifying the output and processing results and then working backwards to determine the steps and combinations of input needed to produce them.
The simple graphic method used in Warnier/Orr diagrams makes the levels in the system evident and the movement of the data between them vivid.