The document discusses how to edit causal factors and scenarios in an STPA project. It explains that the control structure diagram parts will appear in the first column of the causal factors table, and that causal factors can be written generally or individually for each unsafe control action. It also notes that the latest version of the software allows safety analysts to edit causal scenarios by checking or unchecking causal scenarios in the project settings menu.

1. How to edit the causal factors
and scenarios in STPA project
Dr. Asim
Abdulkhaleq
Tutorial 6

2. Causal
Factors TableCausal factors Table
• The parts of control structure diagram will be appeared in the first
column of the causal factors table.
• There are two ways to document the causal factors:
• Write general causal factors
• Write individual casual factors and scenarios for each unsafe
control action which is identified in STPA Step 1
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Click here to edit the causal factor
Click here to delete the causal factor

3. Manage the
causal factors
table with
scenarios
Causal factors Table
• In the version 2.3.0, we implemented the causal scenarios in which the
safety analysts can edit the causal scenarios.
• To add/remove the causal scenarios from the causal factors table.
• Go to menu Project -> Project Settings, then you can uncheck or
check the causal scenarios.
• Finally, click on Apply Button
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Check the box to add causal scenarios column into table.