Carpano, Marie-JoseLeduc-Leballeur, AndreC. E. Vandoni2015-09-292015-09-2919801017-4656https://doi.org/10.2312/eg.19801016Two systems for computer-aided decision analysis are presented. In both of them the man-machine communication is achieved through graphical displays. The first one has been designed to facilitate interactive structural systems analysis. It permits us to automatically display a picture of the system on a CRT. The picture has the form of a hierarchized graph with a reasonably small number of edge-crossings. The second one has been conceived for the interactive construction of project networks and subsequent visualization of the critical path.10.2312/eg.19801016