Change search
ReferencesLink to record
Permanent link

Direct link
Safety and Tool Integration, A System-Theoretic Process Analysis
KTH, School of Industrial Engineering and Management (ITM), Machine Design (Dept.), Mechatronics.ORCID iD: 0000-0001-5704-4504
2012 (English)Report (Other academic)
Abstract [en]

In this report I detail a System-Theoretic Process Analysis (STPA) hazard analysis of the tool integration of development environments for embedded systems. Building on results from previous studies I generalize and expand on earlier findings regarding the relationship between safety and tool integration.

To prepare for the analysis I customized STPA for the context of tool integration. This customization allowed me to subsequently design and analyze three versions of a tool chain originally provided by an industrial partner. A net result of 85, 98 and 73 risks was identified, in comparison to 25 integration weaknesses identified through expert knowledge. The design of the different versions of the tool chain and a comparison of the identified risks with the integration weaknesses allowed me to validate the usefulness of STPA for both identifying and correctly categorizing risks and causes in the context of tool integration. An analysis of my results also points out the fact that STPA is not a silver bullet, without enough expertise it is easy to omit important parts of process models and thus arrive at incomplete conclusions.

In regard to the relationship between safety and tool integration nine properties were identified, properties that need to be supported correctly to avoid hazards in the context of tool integration. These properties require support throughout a noticeable part of a development environment to have an impact and derive much of that impact from the possibility to centralize them. They also interrelate, so that often several of them need to be handled to mitigate one type of risk. However, introducing support for them across a whole development environment is likely to be costly, or even impossible. Furthermore, introducing support for these properties will mitigate some risks, but also create other risks at higher levels of organization.

These properties therefore point to the size a development environment, the number of contexts towards which the development environment can be verified and the effort required to ensure the added requirements at higher levels of organization as deciding factors on whether the effort to support them should be made (other efforts, more efficient in those particular cases, could otherwise be considered). The existence of these properties also point to the possibility of developing and pre-qualifying tools and tool chains based on the assumption that some or all of these properties will be supported by the final development environment. This could potentially lower, or at least distribute, the cost of the final qualification.

Place, publisher, year, edition, pages
KTH Royal Institute of Technology, 2012. , 65 p.
Trita-MMK, ISSN 1400-1179 ; 2012:01
Keyword [en]
Safety, Tool Integration
National Category
Embedded Systems
URN: urn:nbn:se:kth:diva-90843OAI: diva2:506926
QC 20120307Available from: 2012-03-07 Created: 2012-03-01 Last updated: 2012-03-07Bibliographically approved

Open Access in DiVA

fulltext(885 kB)190 downloads
File information
File name FULLTEXT01.pdfFile size 885 kBChecksum SHA-512
Type fulltextMimetype application/pdf

Search in DiVA

By author/editor
Asplund, Fredrik
By organisation
Embedded Systems

Search outside of DiVA

GoogleGoogle Scholar
Total: 190 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Total: 896 hits
ReferencesLink to record
Permanent link

Direct link