With Astah System Safety, you can compare models and diagrams in two project files. Differences can be shown in a list and also in diagrams visually with markups.

Compare Diagram
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Compare Diagrams

  1. Open a file, then go to [File] – [Compare Project and Merge].
    Compare Project and Merge menu in Astah System Safety

  2. Select another project file to compare.

  3. The [Differences] pop-up opens, showing the diagrams and models of both project files side by side in a tree view.
    Comparing models in Astah System Safety
    Diagrams and models with differences are indicated by color:
    • Blue: The model exists in both files, but differs between them.
    • Red: The model does not exist in this file but exists in the other file.
    • Green: The model exists only in this file and not in the other file.
  4. To see the differences visually in diagrams, select a diagram in the tree view and click [Open Compare Diagram].
    Compare Diagrams

  5. The two diagrams open with the differences marked up.
    Comparing two Astah System Safety diagrams with markups
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You can merge files

If you’d like to merge two projects into one after comparing the models, click the [Merge] button.

How to merge files