Fault Tree Analysis Tool "FaultTree+"

Why is a dedicated tool for FTA+ necessary for ISO26262 functional safety compliance? The answer is simply that it allows for cut set analysis.

1. What can and cannot be done with Excel FT diagrams can be created using Excel (or other Office tools). However, FT diagrams created in Excel cannot perform safety analyses such as cut set analysis or quantitative evaluations. They also cannot provide explanations for safety assessments of models at the system level. 2. What cannot be done without specialized tools Cut set analysis, common cause failures, dependent failures, and systematic failures are difficult to express without specialized tools. The Enterprise version allows for revision management during collaborative work. It can also integrate with external tools like DOORS to manage changes during collaboration. 3. Differentiating between Excel and FaultTree+ For FT diagrams that are not complex and do not have common cause failures, Excel is suitable as it can be created relatively easily without additional costs. For models that are ASIL C or higher, or those that involve common cause failures that cannot be intuitively identified, FaultTree+ with its robust analysis features is more appropriate. When considering tools for ISO26262 compliance, it is essential to ensure that cut set analysis can be performed.

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