PPT-The Therac-25: A Software Fatal Failure

The Therac25 A Software Fatal Failure Kpea Aagbara Saturday SYSM 6309 Spring 12 UTDallas What is the Therac25 The Therac25 was a medical linear accelerator used to treat cancer patients to remove. Cumulative. . incidence. of events (%). Patients with history of HF at baseline. Patients without history of HF at baseline. Adapted from: Zannad . et al.,. The Lancet Mar 2015. EXAMINE: post-hoc extended MACE . The Therac-25 Incident. The Therac-25 Incident. Worst series of radiation overdoses in over 35 years.. 6 known incidents between June 1985 and January 1987.. Resulted in 3 deaths and 3 cases of severe radiation related injuries.. Computingcases.org. Safeware. In this case…. you will practice decision-making from the participatory standpoint. learn how to make decisions in the face of uncertainty. Uncertain whether the patient complaints indicate radiation overdoes. -25. CS4001 . Kristin Marsicano. Therac-25 Overv. iew. What was the Therac. -25?. How did it relate to previous models? In what ways was it similar/different?. Was the Therac-25 reliable?. Therac-25 Overview. Exploring Electrical Engineering. Chapter 8. Technology Disasters. Herbert G. Mayer, PSU. Status . 2/11/2016. Syllabus. Case Histories. WW III Almost. Medical Killing Machine. AT&T Line Goes Dead. and. Due Process:. Transparency in. Expert Software Systems. AAFS 2016. By. Nathan Adams – . Adams@Bioforensics.com. Dan . Krane. – . Dan.Krane@Wright.edu. Financial disclosure. Employees of Forensic . You work at the East Texas Cancer Center in Tyler, Texas as a physicist who “maintains and checks the machine regularly.” (Huff 2005). Patient complains of “a bright flash of light, heard a frying, buzzing sound, and felt a thump and heat like an electric shock.” (Huff 2005). Not covered . in textbook. Computer errors. A range of possible consequences. Seconds lost. Data lost. $ - $$$. Injuries and deaths. Examples:. Disfranchised voters. False arrests. Price & billing errors. Computingcases.org. Safeware. Start with what was known…. Therac-25 is a medical linear accelerator for use in treating cancer.. At four of the hospitals using this machine, a series of mysterious complaints developed. Authors: Gina Guillaume-Joseph, PhD Candidate. Dr. James Wasek. Dr. . Enrique Campos-Nanez, and. Dr. . Pavel . Fomin. The George Washington University. School of Engineering and Applied Sciences. Engineering Management and System Engineering Dept.. Transparency in. Expert Software Systems. AAFS 2016. By. Nathan Adams – . Adams@Bioforensics.com. Dan . Krane. – . Dan.Krane@Wright.edu. Financial disclosure. Employees of Forensic . Bioinformatic. Lecture 15. software Testing. Two main goals of software testing:. Means of increasing software reliability (Defect Testing).. Tests to find and correct faults. Boundary testing. Code coverage testing. MADe (Maintenance Aware Design environment ) What is MADe?MADe is a software tool used by engineers to model parts, components, sub-systems and systems in order made BENEFITS SUMMARY rapid system ,. and . Risk. What We Will Cover. Failures and Errors in Computer Systems. Case Study: The Therac-25. Increasing Reliability and Safety. Dependence, Risk, and Progress. Failures and Errors in Computer Systems.