{"title":"An Advanced Sustainment Modeling Approach for Global Defense Data Architecture","authors":"Vaibhav V. Suthar","doi":"10.1109/RAMS48030.2020.9153659","DOIUrl":"https://doi.org/10.1109/RAMS48030.2020.9153659","url":null,"abstract":"Summary & ConclusionsThe traditional methodology of collecting critical sustainment data through isolated databases allows users to pull data on-demand; however, this requires manual efforts to merge data to see it in meaningful ways. Hence, this approach does not provide data at the point of need to satisfy warfighter demand. This weakness is due to having various disparate databases across the globe. This approach makes it difficult for an individual to perform analyses that influence support decisions related to the Integrated Logistics Support (ILS) elements as shown in Figure 1 below. Figure 1Integrated Logistics Support Elements1Raytheon employs Model-based Systems Engineering techniques to the Advanced Sustainment Model (ASM) architecture. ASM centralizes, optimizes and automates the collection and distribution of critical sustainment related data across a range of Prime Mission Systems Integrators, Government Logisticians, Original Equipment Manufacturers (OEM) and end-user consumers. The ASM architecture focuses on a software toolkit that runs on user-provided hardware and datalink infrastructure.","PeriodicalId":360096,"journal":{"name":"2020 Annual Reliability and Maintainability Symposium (RAMS)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124476947","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Practical Experience of The Dependability Case to Deliver Real World Benefits – the Initial Case","authors":"R. Denning, N. Barnett","doi":"10.1109/rams48030.2020.9153670","DOIUrl":"https://doi.org/10.1109/rams48030.2020.9153670","url":null,"abstract":"The UK Ministry of Defence developed the Reliability Case (subsequently the dependability case) as a methodology for gaining confidence that new systems and equipment will be reliable when entering service. Recent experience has demonstrated that it is also a valuable tool in the early stages of procurement helping to ensure that the requirements are, understood, relevant and are likely to give the warfighter what is truly required.","PeriodicalId":360096,"journal":{"name":"2020 Annual Reliability and Maintainability Symposium (RAMS)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121585378","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Modelling Reliability and Efficiency of English Community Pharmacy Processes","authors":"M. Naybour, R. Remenyte-Prescott, M. Boyd","doi":"10.1109/RAMS48030.2020.9153661","DOIUrl":"https://doi.org/10.1109/RAMS48030.2020.9153661","url":null,"abstract":"The research reported in this paper describes a Coloured Petri Net (CPN) method for modelling and analysing reliability and efficiency of the dispensing process in English community pharmacies. The results of CPN simulations are used within an optimisation framework, based on an Ant Colony optimisation (ACO) algorithm, in order to find optimal solutions for a range of process parameters, such as the number of dispensers and pharmacists to employ, prescription checking strategy or staff work pattern. Set-ups are evaluated using a multi-objective utility function with three parameters: the number of prescriptions completed, the number of errors, and the average waiting time. In-field data from 4 English pharmacies are used to control the firing of key transitions of the CPN. The results indicate that if a pharmacy has a large budget the optimal setup is likely to contain many staff, of which a majority will be dispensers. Alternatively, if the budget is small, it is likely the optimal team will be small and contain a majority of pharmacists.","PeriodicalId":360096,"journal":{"name":"2020 Annual Reliability and Maintainability Symposium (RAMS)","volume":"143 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132975791","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Aiden Gula, Christian Ellis, Saikath Bhattacharya, L. Fiondella
{"title":"Software and System Reliability Engineering for Autonomous Systems Incorporating Machine Learning","authors":"Aiden Gula, Christian Ellis, Saikath Bhattacharya, L. Fiondella","doi":"10.1109/RAMS48030.2020.9153595","DOIUrl":"https://doi.org/10.1109/RAMS48030.2020.9153595","url":null,"abstract":"Artificial intelligence and machine learning have attracted significant interest as enablers of autonomous systems. However, these techniques are susceptible to a variety of failures as well as adversarial attacks, suggesting the need for formal reliability and resilience engineering methods. Tempered by the knowledge that machine learning is not a panacea and that private industry, infrastructure management, and defense systems are regularly subject to external attack, it is essential to assess the possible failures and corresponding consequences that these technologies may inadvertently introduce. This paper seeks to bridge the gap between traditional and emerging methods to support the engineering of autonomous systems incorporating machine learning. Toward this end we seek to synthesize methods from established fields such as system and reliability engineering as well as software testing with recent trends in the design and test of machine learning algorithms. The proposed approach should provide organizations with additional structure to comprehend and allocate their risk mitigation efforts in order to address issues that will inevitably arise from these less well understood technologies.","PeriodicalId":360096,"journal":{"name":"2020 Annual Reliability and Maintainability Symposium (RAMS)","volume":"237 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133612891","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Alastair Moubray, Jorge Hiraldo, M. Flanagan, Thaddeus Mateja
{"title":"Using System Availability to Drive Logistics Decisions","authors":"Alastair Moubray, Jorge Hiraldo, M. Flanagan, Thaddeus Mateja","doi":"10.1109/RAMS48030.2020.9153716","DOIUrl":"https://doi.org/10.1109/RAMS48030.2020.9153716","url":null,"abstract":"Summary & ConclusionsKeeping a large system fully functional for decades of 24/7 operation is a complicated logistics challenge. This task becomes substantially easier when accurate and comprehensive information on system reliability and availability is available, and kept continuously updated. This paper documents the process used on one major defense site to address this need for system reliability information. The process has been very successful in collecting accurate information, and ten years’ worth of information is now available for some portions of the system. Program management has repeatedly used this information in identifying, quantifying, and prioritizing issues to address. Finally, the paper addresses some issues in extending this process to other systems that are less amenable to providing such continuous and accurate reliability information without additional design effort.","PeriodicalId":360096,"journal":{"name":"2020 Annual Reliability and Maintainability Symposium (RAMS)","volume":"62 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128894039","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Thermal Fatigue in a Membrane Heat Exchanger with Environmental Degradation","authors":"J. Pulido","doi":"10.1109/RAMS48030.2020.9153692","DOIUrl":"https://doi.org/10.1109/RAMS48030.2020.9153692","url":null,"abstract":"Mechanical cooling systems are a critical element of the infrastructure needed for data centers. Effective and efficient cooling of data centers is relevant to the economic and environmental impact of data centers and the communities where they are located. This paper shows the risk elements associated with the development of an air-cooled system and determination of the system reliability. Risks to heating, ventilation and air conditioning (HVAC) equipment under free cooling conditions due to changes in the operating environment, including temperature, humidity, and contamination are evaluated. The most critical unknown factor in the assessment of reliability is the actual conditions under free air cooling, since there is not enough publicly available data to determine the actual environmental envelope under free air-cooling applications. In addition, the most significant difference between free air cooling and traditional air conditioning is the diversity of technical solutions among various free air-cooled data centers, which vary in terms of their location, the specific architecture of the free air cooling, and the inclusion of other power management methods in conjunction with free air cooling.","PeriodicalId":360096,"journal":{"name":"2020 Annual Reliability and Maintainability Symposium (RAMS)","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114421152","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Human Factors Correlation Analysis for Nuclear Micro-Reactors Based on Literature Review and Evidence Theory","authors":"Yunfei Zhao, Patrick Tosh, C. Smidts, R. Boring","doi":"10.1109/RAMS48030.2020.9153723","DOIUrl":"https://doi.org/10.1109/RAMS48030.2020.9153723","url":null,"abstract":"Nuclear micro-reactors have drawn increasing attention in the nuclear industry since they can be potentially applied for a variety of purposes such as desalination and hydrogen production. Nuclear micro-reactors have unique characteristics (e.g. wider use of automation) compared with currently operating large nuclear power plants. These characteristics inevitably influence operator performance. To perform human reliability analysis and system design optimization, it is necessary to have a thorough investigation of such effects. To this end, in this paper we propose a method based on literature review and evidence theory to analyze human factor correlations for nuclear micro-reactors. A literature review is performed to identify studies related to characteristic human factors for micro-reactors. We divide human factors into independent variables that are used to characterize microreactors (e.g., level of automation) and dependent variables (e.g., situation awareness) that are influenced by the independent variables. The correlations between the independent and dependent variables are extracted from the reviewed studies. We should note that there may be conflicts between the correlations extracted from different studies. To address this problem, we use evidence theory to aggregate the potentially conflicting information to draw final conclusions about the correlations. The results obtained in this study demonstrate the high complexity of the relations between independent and dependent variables, including the uncertainties in the relations, the non-monotonic relations, and the inconsistent effects of one independent variable on different dependent variables. The potential applications of the results in human reliability analysis for nuclear micro-reactors and system design optimization are discussed.","PeriodicalId":360096,"journal":{"name":"2020 Annual Reliability and Maintainability Symposium (RAMS)","volume":"16 4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123520147","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Ensuring Aircraft Safety In Single Point Failures, Automation and Human Factors","authors":"Syed Haider","doi":"10.1109/RAMS48030.2020.9153682","DOIUrl":"https://doi.org/10.1109/RAMS48030.2020.9153682","url":null,"abstract":"Modern aircraft are highly reliant on automation for safe and efficient operation. However, automation failure may result in aircraft developing an undesirable state from which it is difficult to recover using traditional hand flying techniques. The recent crash of single aisle aircraft has demonstrated how a benign sensor failure provided false indication that resulted in aircraft automated system action to overtake pilot’s pitch control and led to a flight path from which it finally could not recover. High level aircraft automation can cause gradual loss of pilots’ flying skills leaving them under prepared to cope with an actual emergency or failure and their recovery actions may be erroneous, delayed or incomplete. The risk of accidents caused by single-point failures; either single-point equipment failure or single human error needs to be mitigated by better design for safety and use of technology. The aviation industry is combining technological advances in automation and artificial intelligence with human factors engineering to fully integrate the pilot, the flight deck and the aircraft for increased safety. The industry goal remains to reduce incidents and the impact of human errors in aircraft systems by using technology to enhance human performance and flight safety.","PeriodicalId":360096,"journal":{"name":"2020 Annual Reliability and Maintainability Symposium (RAMS)","volume":"19 4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122116887","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
R. Austin, N. Mahadevan, A. Witulski, G. Karsai, B. Sierawski, peixiong zhao, R. Reed
{"title":"Automatic Fault Tree Generation from Radiation-Induced Fault Models","authors":"R. Austin, N. Mahadevan, A. Witulski, G. Karsai, B. Sierawski, peixiong zhao, R. Reed","doi":"10.1109/RAMS48030.2020.9153630","DOIUrl":"https://doi.org/10.1109/RAMS48030.2020.9153630","url":null,"abstract":"The space environment raises several unique reliability issues for non-optical-based electronic systems for surviving radiation from cosmic rays, our Sun, or the trapped radiation belts. These radiation categories are total ionizing dose (TID), a cumulative degradation mechanism that may eventually lead to component failure, and single-event effects (SEE), random events in time that are either recoverable or permanent failures. Fault effects and degradation caused by these mechanisms can propagate through the system and cause system failure, even mission failure when not accounted for and mitigated.","PeriodicalId":360096,"journal":{"name":"2020 Annual Reliability and Maintainability Symposium (RAMS)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117156978","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"A New Metric for Time-Dependent Mechanism Reliability Analysis","authors":"Shuang Zhou, Jianguo Zhang, Jie Wu","doi":"10.1109/RAMS48030.2020.9153617","DOIUrl":"https://doi.org/10.1109/RAMS48030.2020.9153617","url":null,"abstract":"In classical time-dependent mechanism reliability analysis, probability or fuzzy reliability theory is employed. However, the method based on probability theory requires probability distributions of all the uncertain parameters, but the accurate distributions of parameters in real life are sometimes difficult to obtain. Moreover, fuzzy theory fails to describe many subjective random variables due to the duality of randomness. In this paper, we utilize uncertain variables to uniformly represent the subjective random and epistemic uncertainties by quoting the uncertainty theory.","PeriodicalId":360096,"journal":{"name":"2020 Annual Reliability and Maintainability Symposium (RAMS)","volume":"653 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123976672","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}