Fault Tree Analysis

Question

Please can you add "fault tree analysis" to the layout methods and include the approprate nodes in the palette? Yed seems to be perfect for this type of diagram. http://en.wikipedia.org/wiki/Fault_tree_analysis

Answer 1

Judging from the single example diagram on the Wikipedia page, I think that the tree layout algorithm is already able to calculate the required arrangements.

Regarding the symbols: most of the event shapes are already available in yEd and it has the 'transfer' triangle, but the gates are missing. I recommend that you import these missing symbols as external graphics like described here: http://yed.yworks.com/support/manual/custom_nodes.html

Comments

It seems to me you are looking for orthogonal edge routing. Several of yEd's layout algorithm support this:
- Layout -> Tree -> Directed
- Layout -> Hierarchic
- Layout -> Orthogonal
In addition, the routing algorithms
- Layout -> Edge Routing -> Orthogonal/Polyline
- Layout -> Edge Routing -> Orthogonal
may be used to enforce orthogonal edge routes without changing the positions of nodes.

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Thanks a lot for the response. However, the challenge I have is that event trees are only lines and do not need any of the nodes in the palette. So, how do I draw only the lines without using the nodes?

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Please see How can I create a line that does not end at a node?

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Thomas, is it possible to contribute to Yed to create a pre-defined palette for the fault analysis symbols?

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I am afraid, we do not accept contributions for yEd at this time.

You can, of course, create a user-defined palette section and publish the corresponding GraphML file for others to use. E.g. several such palette GraphML files have been published on GitHub:
https://github.com/abesto/yed-aws-palettes
https://github.com/gardar/yed-fa-palettes