Tutorial-4

Editing Unsafe Control Actions of STPA project in XSTAMPP

September 2016

Asim Abdulkhaleq

University of Stuttgart 2

Control Actions Table Control Actions Table

• When you dragged and dropped a control action into the control structure diagram, XSTAMPP will automatically save them into the control actions table with information of source and destination components.

You can here add a description of eachcontrol action

Unsafe control

actions Table Unsafe Control Actions Table • The control actions will also be appeared in the first column of the

unsafe control actions. • Each control action should be evaluated within four hazardous types:

• Not Providing causes hazard• Providing causes hazard• Wrong timing or order causes hazards• Stopped too soon or Applied too long

• If an item in the table is hazardous, then you have to assign which hazards from the hazards table can cause this unsafe control actions, otherwise, it will be considered as not hazardous

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Unsafe control

actions Table Editing Unsafe Control Actions • You can edit an unsafe control action by clicking on the add button

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• To link hazard to the unsafe control action, click on the button and select from the context menu a hazard. The code number of the UCA will be appeared.

You can choose from here a hazard.To add more hazards, you have to click on the linkbutton again

Unsafe control

actions Table Delete an Unsafe Control Action • You can delete an unsafe control action by clicking on the button

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• You have to confirm the deleting command by clicking on OK button, then all information of this unsafe control action will be deleted

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Create a new STPA project Searching for An Unsafe Control Action

• You can search for an unsafe control action by using different search filters such as control action, or unsafe control action or the UCD ID.

• You have to type the text in the search text box e.g. Accelerate

University of Stuttgart

Exporting Unsafe

Control Action Table

Exporting the unsafe Control Actions Table

• You can export the control action table as image or CSV sheet orPDF by click on the Export button in main toolbar.

• Next, you have to select the type of exporting: STPA DATA Sheets,or Images or PDF. Then click on Next button.

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Exporting Unsafe Control

Actions Table

Exporting Unsafe Control Action Table as an CVS Sheet

• As default, the name of current project will be appeared at the topof the list.

• Then, you have to select the type of separators of CVS sheets andlocation of exporting the file.

Choose the project name which you want to export its data

Choose one type of separators of CVS sheets

Choose the destination path to export the data in.

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An Issue An Issue in Editing of Unsafe Control Actions Table

• In the version of Mac OS X, some of users faced a problem whenthey typed a text in a cell of the table, then the text will not save it.

• This issue did not appear on Windows or Linux.• Solution:

• You have to type your text and does not move the mouse overthe current cell or the unsafe control action table. Then, pressEnter button to save the content.

• You can also contact with me if you need more information

Thank you!

e-mailphone +49 (0) 711 685-fax +49 (0) 711 685-

Universität Stuttgart

Asim Abdulkhaleq, Ph.D Candidate

88 45888 380

Institute of Software Technology, Software Engineering Group

asim.abdulkhaleq@informatik.uni-stuttgart.de

The slides will be also available at the website www.xstampp.de