Automated fault tree analysis via AI/ES

A description is given of FTA, an interactive fault tree analysis tool that integrates the creation of fault trees with the propagation of failure rates. This tool allows the engineer to create, modify and manipulate fault trees easily, and requires little instruction on how to use the software. The fault trees generated are directly used in the propagation of failure rates without having to exit from the design environment. FTA software runs on a Xerox 1100 series workstation and is written in Interslip-D. The workstation has a large bit-mapped screen, and users interact with the workstation by input through a keyboard or selection by a mouse