Tree-drawing software

As a practical matter, the modern-day analyst uses appropriate computer software to propagate quantified data and to determine cut sets and minimum cut sets. Computer assistance is also highly recommended for drawing and/or constructing fault trees. 

Figure 7.4 is a typical branch of a large fault tree. There are a number of ways to solve a fault tree top-down substitution, bottom-up substitution, and even using Monte Carlo simulations (with actual failure data). Also, a number of computer programs can solve (and draw) the tree. It is impossible to keep up to date with the changes in software programs for fault trees. Here are some of the software programs on the market ... 

A wide number of commercial and academic tools for static fault tree analysis are available. Some are merely drawing tools, while others provide probabilistic analysis, like the popular FaultTree-f package from Isograph [14]. Dynamic FTA is supported by tools like Windchill [18], NASA s Galileo/ASSAP software [11], and the simulation tool DFTSim [10]. A first implementation of DFT analysis using I/0-IMCs was realized in Coral [7], the predecessor of DFTCalc. 

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