The incident involving computer-controlled radiation and human fatality is the largest and worst incidence of human mistake to date. Therac-25 was a medical linear accelerator, or linac, created by the French company CGR and the Canadian corporation AECL (Atomic Energy of Canada Limited).
Where did the Therac-25 go wrong?
- Instead of pointing to specific coding problems, a commission blamed overall bad software design and development processes as the main reason. The program was specifically created to make it very impossible to test it thoroughly and automatically.
- Therac-25 crashes were caused by a variety of circumstances. Many of the contributing causes were the work of AECL. Overall, AECL employed subpar engineering practices. For example, only one programmer was assigned to creating the machine's complex, real-time software.
- Therac-25 was the most advanced and computerized radiation therapy device available at the time. The gadget may pick different treatment table placements and the type/strength of the energy chosen by the operating specialist with the help of an inbuilt computer.
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