Safetycritical systems are systems where failures lead to catastrophic results. Dei cisuc, university of coimbra, polo 2, 3030290 coimbra, portugal. Reliability engineering relates closely to safety engineering and to system safety, in that they use common methods for their analysis and may require input from each other. View nuno silvas profile on linkedin, the worlds largest professional community. According to microsoft, there is no after windows 10. Application fields for its products range from including telecoms, public sector, industry, aerospace, transportation and defence. Further development of the design and updates are as well relevant for the operation of the oltc. Critical software sa, portugal, coimbra safety critical systems. Nuno silva read 46 publications contact nuno silva.
Inside the complex world of lifesaving software and. May 06, 2015 4 thoughts on the flash crash, systems failures, and missioncritical engineering jh may 6, 2015 at 9. The problem with this is that more and more technologies. Since the failure of a safety critical system may lead to loss of human lives or large economical effects, the. Publications cecris project certification of critical systems. These standards describe the phases of the lifecycle, and the techniques to be adopted to guarantee or assess the.
The development of safety critical systems requires the compliance to several safety standards and regulations. The objective of the research was to tackle the challenges of certification by focusing on those. University of coimbra certification of critical systems. Linkedin is the worlds largest business network, helping professionals like rui lopes discover inside connections to recommended job candidates, industry experts, and business partners. Login with amazon try a 30day free trial of amazon prime relogin required on woot.
The framework is evaluated to detect the activation of software faults in a complex distributed system for air. For all the aweinspiring developments, people still seem to have concerns about the reliability of the technology we use in our lives. What will be the future of microsoft windows after. Common safety method for risk evaluation and assessment. The workshop welcomes contributions related to any area of critical software. As safety critical software complexity is increasing, these tools provide a. Reliability and safety have always been associated to safety critical systems. A new study commissioned by critical software has revealed that 50% of respondents believe the technology they use is properly tested. Sysmlbased and prologsupported fmea fabio scippacercola, roberto pietrantuono, stefano russo, nuno pedro silvaz dieti, universita degli studi di napoli federico ii via claudio 21, 80125 napoli, italy fabio. View nuno silva s profile on linkedin, the worlds largest professional community. An empirical approach to improve the quality and dependability of.
Challenges for creating a representative fault model for fault. Lessons learned from application of system and software. But when it comes to softwareintensive systems these techniques have some crucial disadvantages, especially in modeling timing behavior. This paper presents the preliminary reliability estimation activities of an electronic system designed for a largescale and complex safety critical system.
Monteleone esa reference architecture for high dependability onboard computers abstract talk presentation article part 2. The cecris experience andrea bondavalli, francesco brancati isbn. Inside the complex world of lifesaving software and safety. The book introduces methods and tools adopted by the critical systems industry, and surveys key achievements of the critical step project along four directions. Preliminary investigation on safetyrelated standards. Nuno silva, pmp, phd coimbra e regiao, portugal perfil. Critical software provides solutions for mission and business critical information systems. The problem with this is that more and more technologies are.
Always available to get is hands dirty and help out in the most insane or mission critical tasks without complaining and always with a smile and all around good mood and joy. Reliability engineering focuses on costs of failure caused by system downtime, cost of spares, repair equipment, personnel, and cost of warranty claims. The ones marked may be different from the article in the profile. Study reveals tech testing concerns news trends opinions. Moraes code change history and software vulnerabilities6 marcus pianco, baldoino fonseca, and nuno antunes radiance. An enormous gratitude goes to my employer, critical software. However, the effects of y27632 on the expansion of adult human adiposederived stem cell hadsc cultures remain to be established. The importance of the software level rams analysis in the identification of new failure modes and its impact on the system level rams analysis is discussed. Hemodynamic differences among hypertensive patients with and without heart failure using impedance cardiography.
See the complete profile on linkedin and discover nunos connections. Cloud and soa services hierarchical model and sensitivity analysis for a cloudbased vod streaming. Since, most of the times, human life is at stake, it is crucial to fully understand the behaviour of the system being developed in order to predict and avoid any potential deadly failures. This cited by count includes citations to the following articles in scholar. Silva noted that the only system where you can have zero failures is the system with zero lines of code. Get started by logging in with amazon or try a 30day free trial of amazon prime. Certifications of critical systems the cecris experience documents the main insights on cost effective verification and validation processes that were gained during work in the european research project cecris certification of critical systems. The demand for largescale dependable, systems, such as air traffic management, industrial plants and space systems, is attracting efforts of many wordleading european companies and smes in the. The on load tap changer is one of the most critical components for a safe operation of the transformer. Workshop on safety and security of intelligent vehicles ssiv. Portuguese technology on its way to the sun space today. Study finds that technology fails people every week the.
Nearly one in two people say technology fails them once a week or more, a new study commissioned by critical software has revealed. Nuno silva, technical safety manager at critical software, a consulting. Nuno silva, critical software s chief test engineer, said. But the failure wasnt just due to spotty softwarethe system simply wasnt prepared for. Enhanced coverage of mathematics of reliability, physics of failure, graphical and software methods of failure data analysis, reliability prediction and modelling, design for reliability and safety as well as. Cfp14087pod 9781479960347 2014 ieee 25th international symposium on software. Critical failures caverns and creatures book 1 by robert bevan is so hilarious, and i am not a gamer. Electronic reliability estimation proceedings of the.
Publications cecris project certification of critical. Having to test the complete avionics of the spacecraft, nuno silva and his team, ended up working with critical software, as they to tested the flight control and full onboard software, developed by critical. Nuno silva program manager, critical software, sa verified email at. Nuno silva data scientist pharmaccess foundation linkedin. What will be the future of microsoft windows after windows 10. While software doesnt wear out like hardware does, it can and will fail. The pressure to release new technologies can sometimes come at a cost to reliability. Its essential for teams developing anything safetycritical to get the number of potential failures that could lead to harm as close to zero as possible.
For the narrow slice of systems and software that lives depend on, dubbed safety critical, the requisite oversight comes alongside strict government, industry, and trade organizationmandated standards that prove the software is safe to use in highstakes applications. Static code analysis tools available today range from lintbased syntax parsers to standards compliance checkers to tools using more formal methods for verification. Validation and dependability services and methods used at critical softwaremore. Evaluating a corpus of root causes and measures to guide rca processes in critical software. Number of operations, application and design have effect in the maintenance recommendations for reliable operation.
One of the bellwether incidents that inspired greater rigor in the development of safetycritical software was a series of serious malfunctions by the therac25, a radiation therapy machine that killed or caused grave injury to six people in the mid1980s. Pdf static analysis tools, a practical approach for. Assessment of defect type influence in complex and. For the certification of modern safety critical systems tree based failure models, like standardized fault trees fts, are frequently used methodologies. Innovative technologies for dependable otsbased critical systems. The international symposium on software reliability engineering issre is focused on innovative techniques and tools for assessing, predicting, and improving the reliability, safety, and security of software products. Prasad sistla, university of illinois at chicago, usa hongyu zhang, microsoft research, china thomas zimmermann, microsoft research, usa myron hecht, sbcglobal, usa mikael lindvall, fraunhofer, usa kalyan vaidyanathan, oracle corporation, usa ugo buy, university of illinois at chicago, usa. Furthermore, as processing power increases and software becomes more sophisticated, these vehicles gain the ability to perform complex operations, becoming more autonomous, efficient, adaptable, comfortable, safe and usable. Nikora fast abstract ii safety and performance coengineering. Certifications of critical systems the cecris experience.
Formal methods malfunction can severely harm peoples lives, environment may be used to give a description of the system to be or equipment. Y27632 is a wellknown inhibitor of the rhoassociated coiled kinase rock and has been shown to significantly improve the culture of a variety of multipotent stem cell types. Issrew 12 proceedings of the 2012 ieee 23rd international symposium on software reliability engineering workshops pages 84 november 27 30, 2012 ieee computer society washington, dc, usa 2012. Inside the complex world of lifesaving software and safetycritical. Their combined citations are counted only for the first article. For the narrow slice of systems and software that lives depend on, dubbed safetycritical, the requisite oversight comes alongside strict government, industry, and trade organizationmandated standards that prove the software is safe to use in highstakes applications. There has been a quiet revolution for those not in the field over the last 30 years in the field of program verification. Failure of y27632 to improve the culture of adult human. Orthogonal classification of safety critical issues. Cps have thus become part of common vehicles, accessible to everyone, such as automobiles or unmanned aerial vehicles uavs. Validation and dependability services and methods used at critical software more. Impedance cardiography icg is a reliable, well tolerated and noninvasive method used to assess the hemodynamic pattern of the cardiovascular system, which may be useful in heart failure hf diagnosis, hemodynamic monitoring of critically ill patients, and help in the choice of antihypertensive therapy. Abstract techniques to classify defects have been used for decades, providing relevant information on how to improve systems.
Activation of immune and inflammatory systems in chronic. Innovative technologies for dependable otsbased critical. The impact of niv failure on patients outcomes is the second important issue. This included highly sophisticated test benches, including highfidelity realtime simulators and the actual spacecraft. Asad salkham, antonio pecchia, and nuno silva toward baselining software anomalies in nasa missions lucas layman, marvin zelkowitz, victor basili, and allen p. Rui lopes london, united kingdom professional profile. A framework to identify companies gaps when introducing new standards for safetycritical software. Csw is an independent and privately owned company founded in 1998, the company today employs over 250. In recent years, a considerable amount of effort has been devoted, both in industry and academia, to the development, validation, and verification of critical systems, i. The launch of cryosat2 will be a very special moment for critical software, as this is one of the companys first missions the space area, but also for the emotional weight of seeing almost 10 years of work coming to fruition, not only of their elements but also by all the european partners involved in this project, underlines nuno silva. Critical software validates critical systems in satellite. The workshop welcomes contributions related to any area of critical software systems and certification. The onepoll survey of 2,000 people also found that only half of people think the tech in their lives is properly tested before being sold, despite 98% stating that the reliability of the tech they use is important. A process for finding and tackling the main root causes.
This is covered by application standards, processes, techniques and. Investigation on safetyrelated standards for critical systems. Each chapter is supported by practice questions, and a solutions manual is available to course tutors via the companion website. Nuno silva and francisco moreira critical software date. The ability to predict the failure profile of electronic components is essential to design the system and plan maintenance activities. Lessons learned from application of system and software level rams analysis to a space control system nuno silva 1 and alexandre esper 1, 1 critical software, s. We observed a significantly higher incidence of niv failure in immunocompromised patients than in controls, in keeping with the observation of thille that a diagnosis of active cancer is independently associated with niv failure. Nuno silva program manager at critical software, coimbra, portugal the role of data for safety critical systems development and validation purpose and scope computer systems are intertwined in many modern human activities and, more importantly, they play key roles in critical. A field study on root cause analysis of defects in space software. See the complete profile on linkedin and discover nuno s connections. Verification is the process of determining that a a safetycritical software system is a system whose failure or system or module meets its specification.
Naples, italy 3 6 november 2014 ieee catalog number. The wosocer workshop is a forum to discuss novel solutions for the assessment and certification of software in critical systems, and to promote their adoption through industrial and academic research projects. Hemodynamic differences among hypertensive patients with and. Ssiv2016 lsec critical embedded systems laboratory. The onepoll survey of 2,000 people also found that only half of peo. Nuno arias silva has more than 20 years working on it, with master in information technologies, last projects have more focus in office 365, infrastructures and. The flash crash, systems failures, and missioncritical. Microsoft has altered the way it engineers and delivers windows, and the initial result is windows 10.
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