https://github.com/google-developers-sohag/therac-25-anti-patterns

Analysis of the most famous historical catastrophic medical radiotherapy device including it's catastrophic software anti-patterns.
https://github.com/google-developers-sohag/therac-25-anti-patterns

antipatterns error-analysis error-handling malfunction medical-imaging medicine pdp-11 radiotherapy software-engineering software-failure therac-25

Last synced: 5 days ago
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Analysis of the most famous historical catastrophic medical radiotherapy device including it's catastrophic software anti-patterns.

• Host: GitHub
• URL: https://github.com/google-developers-sohag/therac-25-anti-patterns
• Owner: Google-Developers-Sohag
• License: bsd-3-clause
• Created: 2023-10-02T22:01:54.000Z (over 1 year ago)
• Default Branch: master
• Last Pushed: 2023-10-04T04:08:03.000Z (over 1 year ago)
• Last Synced: 2024-11-10T20:19:22.565Z (2 months ago)
• Topics: antipatterns, error-analysis, error-handling, malfunction, medical-imaging, medicine, pdp-11, radiotherapy, software-engineering, software-failure, therac-25
• Homepage: https://web.stanford.edu/class/cs240/old/sp2014/readings/therac-25.pdf
• Size: 1.95 KB
• Stars: 2
• Watchers: 0
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# Therac-25-Anti-patterns

> An analysis of the famous catastrophe Therac-25 pitfalls, a computer-based radiotherapy device developed by AECL (Atomic Energy of Canada Limited) between 1985 and 1987.

> 

> This analysis is based on Mrs. Leveson's investigations article posted on the Stanford web archive with some Hardware-Software Co-design in mind.

## Table of contents:

- What's Therac-6, Therac-20, and Therac-25?

- The "Therac" series software defects.

- The "Therac" design pitfalls.

- How hardware protection overrides software pitfalls in Therac-6 and Therac-20.

- Therac-25 reported `Malfunction-45`.

- A deeper look into a simulation code and simulation fix environment.

- Naming anti-patterns utilized in the Therac software (Race conditions and concurrent programming).

- An approach to avoid these catastrophic errors.