Relevant bibliographies by topics / Times to repair

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Times to repair'

Author: Grafiati
Published: 4 June 2021
Last updated: 12 February 2022

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Journal articles on the topic "Times to repair"

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Chauhan, Aakash, Patrick Schimoler, Mark C. Miller, Alexander Kharlamov, Gregory A. Merrell, and Bradley A. Palmer. "Comparing Biomechanical Properties, Repair Times, and Value of Common Core Flexor Tendon Repairs." HAND 13, no. 3 (April 19, 2017): 313–18. http://dx.doi.org/10.1177/1558944717701238.

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Background: The aim of the study was to compare biomechanical strength, repair times, and repair values for zone II core flexor tendon repairs. Methods: A total of 75 fresh-frozen human cadaveric flexor tendons were harvested from the index through small finger and randomized into one of 5 repair groups: 4-stranded cross-stitch cruciate (4-0 polyester and 4-0 braided suture), 4-stranded double Pennington (2-0 knotless barbed suture), 4-stranded Pennington (4-0 double-stranded braided suture), and 6-stranded modified Lim-Tsai (4-0 looped braided suture). Repairs were measured in situ and their repair times were measured. Tendons were linearly loaded to failure and multiple biomechanical values were measured. The repair value was calculated based on operating room costs, repair times, and suture costs. Analysis of variance (ANOVA) and Tukey post hoc statistical analysis were used to compare repair data. Results: The braided cruciate was the strongest repair ( P > .05) but the slowest ( P > .05), and the 4-stranded Pennington using double-stranded suture was the fastest ( P > .05) to perform. The total repair value was the highest for braided cruciate ( P > .05) compared with all other repairs. Barbed suture did not outperform any repairs in any categories. Conclusions: The braided cruciate was the strongest of the tested flexor tendon repairs. The 2-mm gapping and maximum load to failure for this repair approached similar historical strength of other 6- and 8-stranded repairs. In this study, suture cost was negligible in the overall repair cost and should be not a determining factor in choosing a repair.
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Frostig, Esther. "OPTIMAL REPAIR OF A SERIES SYSTEM WITH FIXED REPAIR TIMES." Probability in the Engineering and Informational Sciences 13, no. 4 (October 1999): 477–87. http://dx.doi.org/10.1017/s0269964899134041.

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Consider a system consisting of n components in series, subject to failures, with one repairman. No preemption is permitted during a repair. The repairman has a list of components and when he becomes available he repairs the failed component which is closest to the top of the list. The goal is to minimize the mean time until all the components operate—the mean down time. For systems consisting of two components, we assume that the operation and repair times are generally distributed and that the operation times are stochastically ordered. For systems consisting of n components we assume exponentially distributed operation times with rate λi and fixed repair times. We prove that lists in which the components are ordered in an increasing order of their expected operation times are optimal.
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Gupta, Ramesh C., and S. N. U. A. Kirmani. "On predicting repair times in a minimal repair process." Communications in Statistics - Simulation and Computation 18, no. 4 (January 1989): 1359–68. http://dx.doi.org/10.1080/03610918908812825.

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Rangan, A., and R. Esther Grace. "Optimal replacement policies for a deteriorating system with imperfect maintenance." Advances in Applied Probability 21, no. 04 (December 1989): 949–51. http://dx.doi.org/10.1017/s0001867800019194.

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A system is repaired on failure. With probabilityp,it is returned to the ‘good as new' state (perfect repair) and with probability 1 –p, it is returned to the functioning state, but is only as good as a system of age equal to its age at failure (imperfect repair). In this article, we develop replacement policies for a deteriorating system with imperfect maintenance. The successive survival times and consecutive repair times form a geometric process which is stochastically non-increasing or non-decreasing respectively. Explicit expressions are obtained for the long-run expected cost under two kinds of replacement policies based on the working age of the system and the number of imperfect repairs before a replacement.
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Rangan, A., and R. Esther Grace. "Optimal replacement policies for a deteriorating system with imperfect maintenance." Advances in Applied Probability 21, no. 4 (December 1989): 949–51. http://dx.doi.org/10.2307/1427781.

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A system is repaired on failure. With probability p, it is returned to the ‘good as new' state (perfect repair) and with probability 1 – p, it is returned to the functioning state, but is only as good as a system of age equal to its age at failure (imperfect repair). In this article, we develop replacement policies for a deteriorating system with imperfect maintenance. The successive survival times and consecutive repair times form a geometric process which is stochastically non-increasing or non-decreasing respectively. Explicit expressions are obtained for the long-run expected cost under two kinds of replacement policies based on the working age of the system and the number of imperfect repairs before a replacement.
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Alfa, Attahiru Sule, and I. T. Castro. "Discrete time analysis of a repairable machine." Journal of Applied Probability 39, no. 03 (September 2002): 503–16. http://dx.doi.org/10.1017/s0021900200021756.

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We consider, in discrete time, a single machine system that operates for a period of time represented by a general distribution. This machine is subject to failures during operations and the occurrence of these failures depends on how many times the machine has previously failed. Some failures are repairable and the repair times may or may not depend on the number of times the machine was previously repaired. Repair times also have a general distribution. The operating times of the machine depend on how many times it has failed and was subjected to repairs. Secondly, when the machine experiences a nonrepairable failure, it is replaced by another machine. The replacement machine may be new or a refurbished one. After the Nth failure, the machine is automatically replaced with a new one. We present a detailed analysis of special cases of this system, and we obtain the stationary distribution of the system and the optimal time for replacing the machine with a new one.
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Alfa, Attahiru Sule, and I. T. Castro. "Discrete time analysis of a repairable machine." Journal of Applied Probability 39, no. 3 (September 2002): 503–16. http://dx.doi.org/10.1239/jap/1034082123.

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We consider, in discrete time, a single machine system that operates for a period of time represented by a general distribution. This machine is subject to failures during operations and the occurrence of these failures depends on how many times the machine has previously failed. Some failures are repairable and the repair times may or may not depend on the number of times the machine was previously repaired. Repair times also have a general distribution. The operating times of the machine depend on how many times it has failed and was subjected to repairs. Secondly, when the machine experiences a nonrepairable failure, it is replaced by another machine. The replacement machine may be new or a refurbished one. After the Nth failure, the machine is automatically replaced with a new one. We present a detailed analysis of special cases of this system, and we obtain the stationary distribution of the system and the optimal time for replacing the machine with a new one.
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Rogero, Ryan, David Beck, Kristen Nicholson, Rachel Shakked, David Pedowitz, and Steven Raikin. "Value of Supine Positioning in Repair of Achilles Tendon Ruptures." Foot & Ankle Orthopaedics 3, no. 3 (July 1, 2018): 2473011418S0040. http://dx.doi.org/10.1177/2473011418s00407.

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Category: Hindfoot Introduction/Purpose: The optimal method of Achilles tendon repair remains undefined. Few previous studies have quantified the financial expenses of Achilles tendon repairs in relation to functional outcomes in order to assess the overall value of the accepted repair techniques. The purpose of this study is to demonstrate the value of supine positioning during open repair (OS) of acute Achilles tendon ruptures through the quantification of operative times, costs, and outcomes in comparison to the commonly performed percutaneous prone (PP) repair technique. Methods: A retrospective review was conducted on 67 patients undergoing OS and 67 patients undergoing PP primary Achilles tendon repair with two surgeons at four surgical locations. Total operating room usage times and operating times were collected from surgical site records. Total operating room times were used to estimate the costs of room usage and anesthesia, while costs of repair equipment were collected from the respective manufacturers. Patients undergoing OS repair completed the Foot and Ankle Ability Measure (FAAM) questionnaire, with activities of daily living (ADL) and sports subscales, Short Form-12 (SF-12), with mental (MCS) and physical (PCS) health subcategories, and the visual analog scale (VAS) for pain preoperatively and at final follow-up. Results: Even with a significantly longer mean surgical time (P=.035), OS repairs had a shorter duration of total operating room time when compared to that of PP repairs (58.4 versus 69.7 minutes, P<.001). Estimated time-dependent costs were lower in OS repairs ($739 versus $861 per procedure, P<.001), while the estimated average total per procedure cost was also lower for OS repairs ($801 versus $1,910 per procedure, P<.001). For patients undergoing OS repair, FAAM-ADL (P<.001), FAAM-Sports (P<.001), SF-12-PCS (P<.001) all increased and VAS grades (P<0.001) decreased from time of initial encounter to final follow-up and were comparable to reported outcomes in the current literature. The complication rate in OS repairs (6.0%) was lower than PP repairs (11.9%), with revisions only occurring in the latter technique. Conclusion: Performing open Achilles tendon repair in the supine position offers substantial value, or “health outcomes achieved per dollar spent”, to providers due to decreased total operating room times and costs with satisfactory functional outcomes.
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MONTORO-CAZORLA, DELIA, and RAFAEL PÉREZ-OCÓN. "MAINTENANCE OF SYSTEMS BY MEANS OF REPLACEMENTS AND REPAIRS: THE CASE OF PHASE-TYPE DISTRIBUTIONS." Asia-Pacific Journal of Operational Research 24, no. 03 (June 2007): 421–34. http://dx.doi.org/10.1142/s0217595907001279.

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We present two models for studying a system maintained by means of imperfect repairs before a replacement or a perfect repair is allowed. The operational and repair times follow phase-type distributions. Imperfect repair means that successive operational times decrease and successive repair times increase. Under these assumptions, models that govern the systems are Markov processes, whose structures are determined, and several performance measures are calculated in transient and stationary regime. These models extend other previously studied in the literature. The incorporation of phase-type distributions allows to apply the model to many other distributions. A numerical example illustrates the calculations and allows a comparison of the results.
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Turman, Kimberly A., David R. Diduch, and Mark D. Miller. "All-Inside Meniscal Repair." Sports Health: A Multidisciplinary Approach 1, no. 5 (July 15, 2009): 438–44. http://dx.doi.org/10.1177/1941738109334219.

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All-inside meniscal repair has gained widespread popularity over recent years. The devices and techniques have rapidly evolved, resulting in increased ease of use and reduced surgical times and risk to the neurovascular structures. Despite these advances, inside-out suture repairs remain the current gold standard, with proven long-term results. All-inside techniques must continue to be compared to inside-out meniscal repair.
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Dissertations / Theses on the topic "Times to repair"

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Pitaš, Martin. "Analýza ztráty zisku dopravní organizace v důsledku opravy po nehodě u autobusů s obsaditelností nad 30 míst." Master's thesis, Vysoké učení technické v Brně. Ústav soudního inženýrství, 2011. http://www.nusl.cz/ntk/nusl-232565.

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The main aim of this master's thesis is preparation of economic and technical data for analysis of profit loss for a transport organization as a result of repair work after an accident involving buses with a carrying capacity of over 30 passengers. Master's thesis has three main parts. First part deals with technical data of buses SOR C 9,5, SOR C 10,5 a MAN Lion's Regio C, theirs equipment and service operation. Economic data about these buses are processed and evaluated in second part. Last part is devoted to the creation of methodology for calculation of profit loss of buses after an accident. It concerns about each model and category of buses with a carrying capacity of over 30 passengers as a whole.
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Hyatt, Marian M. "Adaptive reuse architecture : reconciling building and time." Thesis, Georgia Institute of Technology, 1995. http://hdl.handle.net/1853/23112.

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Eastwood, Grant. "Using computer vision to categorize tyres and estimate the number of visible tyres in tyre stockpile images." Thesis, Nelson Mandela Metropolitan University, 2017. http://hdl.handle.net/10948/16022.

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Pressures from environmental agencies contribute to the challenges associated with the disposal of waste tyres, particularly in South Africa. Recycling of waste tyres in South Africa is in its infancy resulting in the historically undocumented and uncontrolled existence of waste tyre stockpiles across the country. The remote and distant locations of such stockpiles typically complicate the logistics associated with the collection, transport and storage of waste tyres prior to entering the recycling process. In order to optimize the logistics associated with the collection of waste tyres from stockpiles, useful information about such stockpiles would include estimates of the types of tyres as well as the quantity of specific tyre types found in particular stockpiles. This research proposes the use of computer vision for categorizing individual tyres and estimating the number of visible tyres in tyre stockpile images to support the logistics in tyre recycling efforts. The study begins with a broad review of image processing and computer vision algorithms for categorization and counting objects in images. The bag of visual words (BoVW) model for categorization is tested on two small data sets of tread tyre images using a random sub-sampling holdout method. The categorization results are evaluated using performance metrics for multiclass classifiers, namely the average accuracy, precision, and recall. The results indicated that corner-based local feature detectors combined with speeded up robust features (SURF) descriptors in a BoVW model provide moderately accurate categorization of tyres based on tread images. Two feature extraction methods for extracting features for use in training neural networks (NNs) for tyre count estimations in tyre stockpiles are proposed. The two feature extraction methods are used to describe images in terms of feature vectors that can be used as input for NNs. The first feature extraction method uses the BoVW model with histograms of oriented gradients (HOG) features collected from overlapping sub-images to create a visual vocabulary and describe the images in terms of their visual word occurrence histogram. The second feature extraction method uses the image gradient magnitude, gradient orientation, and edge orientations of edges detected using the Canny edge detector. A concatenated histogram is constructed from individual histograms of gradient orientations and gradient magnitude. The histograms are then used to train NNs using backpropogation to approximate functions from the feature vectors describing the images to scalar count estimations. The accuracy of visible object count predictions are evaluated using NN evaluation techniques to determine the accuracy of predictions and the generalization ability of the fit model. The count estimation experiments using the two feature extraction methods for input to NNs showed that fairly accurate count estimations can be obtained and that the fit model could generalize fairly well to unseen images.
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Söderholm, Matilda, and Lisa Habbe. "Estimating Time to Repair Failures in a Distributed System." Thesis, Linköpings universitet, Institutionen för datavetenskap, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-131847.

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To ensure the quality of important services, high availability is critical. One aspect to be considered in availability is the downtime of the system, which can be measured in time to recover from failures. In this report we investigate current research on the subject of repair time and the possibility to estimate this metric based on relevant parameters such as hardware, the type of fault and so on. We thoroughly analyze a set of data containing 43 000 failure traces from Los Alamos National Laboratory on 22 different cluster organized systems. To enable the analysis we create and use a program which parses the raw data, sorts and categorizes it based on certain criteria and formats the output to enable visualization. We analyze this data set in consideration of type of fault, memory size, processor quantity and at what time repairs were started and completed. We visualize our findings of number of failures and average times of repair dependent on the different parameters. For different faults and time of day we also display the empirical cumulative distributionfunction to give an overview of the probability for different times of repair. The failures are caused by a variety of different faults, where hardware and software are most frequently occurring. These two along with network faults have the highest average downtime. Time of failure proves important since both day of week and hour of day shows patterns that can be explained by for example work schedules. The hardware characteristics of nodes seem to affect the repair time as well, how this correlation works is although difficult to conclude. Based on the data extracted we suggest two simple methods of formulating a mathematical model estimating downtime which both prove insufficient; more research on the subject and on how the parameters affect each other is required.
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Cruz, David F. "Repair cycle time reduction at Naval Aviation Depots via reduced Logistics Delay Time." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1997. http://handle.dtic.mil/100.2/ADA342536.

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Thesis (M.S. in Management) Naval Postgraduate School, December 1997.
"December 1997." Thesis advisor(s): Keebom Kang, Donald Eaton. Includes bibliographical references (p. 87). Also available online.
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Santos, Leonardo Pereira. "Cost-effective dynamic repair for FPGAs in real-time systems." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2016. http://hdl.handle.net/10183/138206.

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Field-Programmable Gate Arrays (FPGAs) são largamente utilizadas em sistemas digitais por características como flexibilidade, baixo custo e alta densidade. Estas características advém do uso de células de SRAM na memória de configuração, o que torna estes dispositivos suscetíveis a erros induzidos por radiação, tais como SEUs. TMR é o método de mitigação mais utilizado, no entanto, possui um elevado custo tanto em área como em energia, restringindo seu uso em aplicações de baixo custo e/ou baixo consumo. Como alternativa a TMR, propõe-se utilizar DMR associado a um mecanismo de reparo da memória de configuração da FPGA chamado scrubbing. O reparo de FPGAs em sistemas em tempo real apresenta desafios específicos. Além da garantia da computação correta dos dados, esta computação deve se dar completamente dentro do tempo disponível (time-slot), devendo ser finalizada antes do tempo limite (deadline). A diferença entre o tempo de computação dos dados e a deadline é chamado de slack e é o tempo disponível para reparo do sistema. Este trabalho faz uso de scrubbing deslocado dinâmico, que busca maximizar a probabilidade de reparo da memória de configuração de FPGAs dentro do slack disponível, baseado em um diagnóstico do erro. O scrubbing deslocado já foi utilizado com técnicas de diagnóstico de grão fino (NAZAR, 2015). Este trabalho propõe o uso de técnicas de diagnóstico de grão grosso para o scrubbing deslocado, evitando as penalidades de desempenho e custos em área associados a técnicas de grão fino. Circuitos do conjunto MCNC foram protegidos com as técnicas propostas e submetidos a seções de injeção de erros (NAZAR; CARRO, 2012a). Os dados obtidos foram analisados e foram calculadas as melhores posição iniciais do scrubbing para cada um dos circuitos. Calculou-se a taxa de Failure-in-Time (FIT) para comparação entre as diferentes técnicas de diagnóstico propostas. Os resultados obtidos confirmaram a hipótese inicial deste trabalho que a redução do número de bits sensíveis e uma baixa degradação do período do ciclo de relógio permitiram reduzir a taxa de FIT quando comparadas com técnicas de grão fino. Por fim, uma comparação entre as três técnicas propostas é feita, analisando o desempenho e custos em área associados a cada uma.
Field-Programmable Gate Arrays (FPGAs) are widely used in digital systems due to characteristics such as flexibility, low cost and high density. These characteristics are due to the use of SRAM memory cells in the configuration memory, which make these devices susceptible to radiation-induced errors, such as SEUs. TMR is the most used mitigation technique, but it has an elevated cost both in area as well as in energy, restricting its use in low cost/low energy applications. As an alternative to TMR, we propose the use of DMR associated with a repair mechanism of the FPGA configuration memory called scrubbing. The repair of FPGA in real-time systems present a specific set of challenges. Besides guaranteeing the correct computation of data, this computation must be completely carried out within the available time (time-slot), being finalized before a time limit (deadline). The difference between the computation time and the deadline is called the slack and is the time available to repair the system. This work uses a dynamic shifted scrubbing that aims to maximize the repair probability of the configuration memory of the FPGA within the available slack based on error diagnostic. The shifted scrubbing was already proposed with fine-grained diagnostic techniques (NAZAR, 2015). This work proposes the use of coarse-grained diagnostic technique as a way to avoid the performance penalties and area costs associated to fine-grained techniques. Circuits of the MCNC suite were protected by the proposed techniques and subject to error-injection campaigns (NAZAR; CARRO, 2012a). The obtained data was analyzed and the best scrubbing starting positions for each circuit were calculated. The Failure-in-Time (FIT) rates were calculated to compare the different proposed diagnostic techniques. The obtained results validated the initial hypothesis of this work that the reduction of the number of sensitive bits and a low degradation of the clock cycle allowed a reduced FIT rate when compared with fine-grained diagnostic techniques. Finally, a comparison is made between the proposed techniques, considering performance and area costs associated to each one.
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Yoo, Dong Y. "Repair time model for different building sizes considering the earthquake hazard." Thesis, California State University, Long Beach, 2016. http://pqdtopen.proquest.com/#viewpdf?dispub=10142981.

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Recent earthquakes devastated lives and destroyed a great stock of buildings. As a result, the earthquake-impacted regions incurred huge business and operation interruption losses. To minimize the business interruption losses through Performance-Based Seismic Design, there is an obvious need for a validated downtime model that would cover a large spectrum of building sizes and types. Building downtime consists of securing finances, mobilizing contractors, engineers and supplies, and the time to perform the actual repair, i.e., repair time. This study focuses on developing a model to characterize the repair time contribution to the downtime as an extension to FEMA P-58 Loss Assessment Methodology. The proposed repair time model utilizes the Critical Path Method for repair scheduling and realistic labor allocations that are based on the amount and severity of building damage. The model is validated on a significant sample of data collected through case studies from previous earthquakes, interviews with contractors, engineers, and inspectors. The proposed model also has a capability of scheduling resources to meet resource limitations that can either come from labor congestions or from a surge in demands following a disaster. The proposed resource scheduling method provides an efficient way of reducing the number of workers during labor congestions while minimizing its effect on the project duration. The final outcome is a realistic estimation of repair time associated with an earthquake.

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Nazar, Gabriel Luca. "Fine-grained error detection techniques for fast repair of FPGAs." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2013. http://hdl.handle.net/10183/77746.

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Field Programmable Gate Arrays (FPGAs) são componentes reconfiguráveis de hardware que encontraram grande sucesso comercial ao longo dos últimos anos em uma grande variedade de nichos de aplicação. Alta vazão de processamento, flexibilidade e tempo de projeto reduzido estão entre os principais atrativos desses dispositivos, e são essenciais para o seu sucesso comercial. Essas propriedades também são valiosas para sistemas críticos, que frequentemente enfrentam restrições severas de desempenho. Além disso, a possibilidade de reprogramação após implantação é relevante, uma vez que permite a adição de novas funcionalidades ou a correção de erros de projeto, estendendo a vida útil do sistema. Tais dispositivos, entretanto, dependem de grandes memórias para armazenar o bitstream de configuração, responsável por definir a função presente do FPGA. Assim, falhas afetando esta configuração são capazes de causar defeitos funcionais, sendo uma grande ameaça à confiabilidade. A forma mais tradicional de remover tais erros, isto é, scrubbing de configuração, consiste em periodicamente sobrescrever a memória com o seu conteúdo desejado. Entretanto, devido ao seu tamanho significativo e à banda de acesso limitada, scrubbing sofre de um longo tempo médio de reparo, e que está aumentando à medida que FPGAs ficam maiores e mais complexos a cada geração. Partições reconfiguráveis são úteis para reduzir este tempo, já que permitem a execução de um procedimento local de reparo na partição afetada. Para este propósito, mecanismos rápidos de detecção de erros são necessários para rapidamente disparar este scrubbing localizado e reduzir a latência de erro. Além disso, diagnóstico preciso é necessário para identificar a localização do erro dentro do espaço de endereçamento da configuração. Técnicas de redundância de grão fino têm o potencial de prover ambos, mas normalmente introduzem custos significativos devido à necessidade de numerosos verificadores de redundância. Neste trabalho, propomos uma técnica de detecção de erros de grão fino que utiliza recursos abundantes e subutilizados encontrados em FPGAs do estado da arte, especificamente as cadeias de propagação de vai-um. Assim, a técnica provê os principais benefícios da redundância de grão fino enquanto minimiza sua principal desvantagem. Reduções bastante significativas na latência de erro são atingíveis com a técnica proposta. Também é proposto um mecanismo heurístico para explorar o diagnóstico provido por técnicas desta natureza. Este mecanismo tem por objetivo identificar as localizações mais prováveis do erro na memória de configuração, baseado no diagnóstico de grão fino, e fazer uso dessa informação de forma a minimizar o tempo de reparo.
Field Programmable Gate Arrays (FPGAs) are reconfigurable hardware components that have found great commercial success over the past years in a wide variety of application niches. High processing throughput, flexibility and reduced design time are among the main assets of such devices, and are essential to their commercial success. These features are also valuable for critical systems that often face stringent performance constraints. Furthermore, the possibility to perform post-deployment reprogramming is relevant, as it allows adding new functionalities or correcting design mistakes, extending the system lifetime. Such devices, however, rely on large memories to store the configuration bitstream, responsible for defining the current FPGA function. Thus, faults affecting this configuration are able to cause functional failures, posing a major dependability threat. The most traditional means to remove such errors, i.e., configuration scrubbing, consists in periodically overwriting the memory with its desired contents. However, due to its significant size and limited access bandwidth, scrubbing suffers from a long mean time to repair, and which is increasing as FPGAs get larger and more complex after each generation. Reconfigurable partitions are useful to reduce this time, as they allow performing a local repair procedure on the affected partition. For that purpose, fast error detection mechanisms are required, in order to quickly trigger this localized scrubbing and reduce error latency. Moreover, precise diagnosis is necessary to identify the error location within the configuration addressing space. Fine-grained redundancy techniques have the potential to provide both, but usually introduce significant costs due to the need of numerous redundancy checkers. In this work we propose a fine-grained error detection technique that makes use of abundant and underused resources found in state-of-the-art FPGAs, namely the carry propagation chains. Thereby, the technique provides the main benefits of fine-grained redundancy while minimizing its main drawback. Very significant reductions in error latency are attainable with the proposed approach. A heuristic mechanism to explore the diagnosis provided by techniques of this nature is also proposed. This mechanism aims at identifying the most likely error locations in the configuration memory, based on the fine-grained diagnosis, and to make use of this information in order to minimize the repair time of scrubbing.
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Mendes, de Oliveira Martins Carlos Daniel. "Real-time studies of DNA repair kinetics following low-LET short-pulse electron radiation." Thesis, University of Oxford, 2014. http://ora.ox.ac.uk/objects/uuid:63a874a6-9348-4504-b4cd-b1cfd129b75d.

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Radiation-induced damage to the genomic DNA of cells may lead to errors in transcription and replication and, if not repaired correctly, these may result in mutations, genomic instability and cell death. Laser microbeams have generally been used by many research groups to investigate the real-time dynamics of protein recruitment in response to DNA insults in mammalian cells; however, such irradiations induce a plethora of DNA damage (including UV base damage, base damage, SSBs and DSBs and complex damage). A novel experimental setup has been designed capable of following the dynamics of protein recruitment in response to DNA insults in mammalian cells shortly following submicrosecond- pulsed electron irradiation of living mammalian cells, not possible using conventional irradiation techniques. This arrangement was developed based on a 6 MeV electron pulse linear accelerator, to deliver sparsely ionising radiation, coupled to an automated, time-lapse inverted epifluorescence microscope imaging system. An integrated robotic system contained within a physiological environment of 37°C and 5% CO2 was used to transfer remotely and repetitively custom-designed cell dishes containing the mammalian cells between irradiation and imaging locations. Following the development of the linear accelerator and associated imaging devices, preliminary ‘proof-of-principle’ investigations were carried out using living HT1080 mammalian cells containing YFP-tagged 53BP1, an established biomarker of DSB, to follow the recruitment and loss of 53BP1 to sites of radiation-induced DNA damage in real-time. This novel experimental setup has allowed for the first time observations of the appearance and disappearance of radiation-induced foci in the same cell population at very early times. These single-foci studies have provided evidence for the formation of not only promptly formed DSBs but also late appearing DNA damage signalled by 53BP1. These data highlight different classes of DSBs formed in response radiation damage. Additionally, the role of cell cycle on the repair kinetics was undertaken using HT1080- 53BP1-YFP cells which also express Geminin-mCherry under appropriate selection. Geminin is increasingly expressed from early S-phase onwards, but is degraded following mitosis. Geminin-associated fluorescence can be used as a marker of progression through the cell cycle. 53BP1 repair kinetics were characterised in response to radiation damage in combination with ATM and PARP inhibitors. These studies provided supporting evidence for the existence of different classes of DSBs, potentially assigned to radiation-induced replication breaks and DSBs formed by enzymatic conversion of clustered damage. These preliminary ‘proof-of-principle’ findings using DNA damage repair as an example, emphasize the use of this novel technology to explore the dynamics of numerous other biochemical processes in living cells in real-time with the knowledge of being able to quantify the range of damage induced by IR coupled with accurate dosimetry. The knowledge obtained may be used to identify potential biological targets coupled with drug discovery for translation into adjuncts for radiotherapy.
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Dao, Cuong D., and M. J. Zuo. "Selective maintenance for multi-state systems considering the benefits of repairing multiple components simultaneously." Springer, 2014. http://hdl.handle.net/10454/17980.

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No
Many industrial systems such as aircrafts, ships, manufacturing systems, etc. are required to perform several missions with finite breaks between missions. Maintenance is only available within the breaks. Due to the limitation of resources, all components in the system may not be maintained as desired. The selective maintenance problem helps the decision makers figure out what critical components to select and how to perform maintenance on these components. This paper studies the selective maintenance for multi-state series-parallel systems with the benefit of repairing multiple components simultaneously. Both time and cost savings can be acquired when several components are simultaneously repaired in a selective maintenance strategy. As the number of repaired components increases, the saved time and cost will also increase due to the share of setting up between components and another additional reduction amount from the repair of multiple identical components. A non-linear optimization model is developed to find the most reliable system subjected to time and cost constraints. Genetic algorithm is used to solve the optimization model. An illustrative example will be provided.
Natural Sciences and Engineering Research Council of Canada (NSERC) and Vietnam International Education Development (VIED)
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Books on the topic "Times to repair"

1

Company, Cummins Engine. Standard repair times: QSK60G series engines. Columbus, Ind: Cummins, 2003.

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Institute of Automotive Engineer Assessors. ICME Manual: 1991,manufacturers' service schedules and repair times. Weybridge: Glass's Guide Service, 1991.

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Institute of Automotive Engineer Assessors. ICME Manual: 1991,manufacturers' service schedules and repair times. Weybridge: Glass's Guide Service, 1991.

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The New York Times season-by-season guide to home maintenance. New York: Times Books, 1992.

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The New York Times home repair almanac: A season-by-season guide for maintaining your home. New York: Lebhar-Friedman Books, 1999.

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Benson, Ragnar. Guerrilla gunsmithing: Quick and dirty methods for fixing firearms in desperate times. Boulder, Colo: Paladin Press, 2000.

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Pierson, John R. Clock repair: Part-time hours, full-time pay. Shingle Springs, Calif: Clockworks Press, 1998.

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Pierson, John R. Clock repair: Part-time hours, full-time pay. Shingle Springs, CA, USA: ClockWorks Press, 1992.

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Old time radios!: Restoration and repair. Blue Ridge Summit, PA: Tab Books, 1991.

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Repair your home--in no time. Indianapolis, Ind: Que, 2005.

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Book chapters on the topic "Times to repair"

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Smith, David J. "Prediction of Repair Times." In Reliability and Maintainability in Perspective, 164–77. London: Macmillan Education UK, 1988. http://dx.doi.org/10.1007/978-1-349-10140-5_16.

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Daduna, Hans. "Exchangeable items in repair systems: Delay times." In Operations Research Proceedings, 479. Berlin, Heidelberg: Springer Berlin Heidelberg, 1988. http://dx.doi.org/10.1007/978-3-642-73778-7_120.

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Liu, Ying. "Repairable Systems with Stochastic Lifetimes and Repair Times." In Reliability Theory Based on Uncertain Lifetimes, 141–89. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-16-0995-4_5.

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Liu, Ying. "Repairable Systems with Random Fuzzy Lifetimes and Repair Times." In Reliability Theory Based on Uncertain Lifetimes, 191–226. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-16-0995-4_6.

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Özdoğru, Ünsal, and Tayfur Altiok. "Analysis of Two-Valve Fluid-Flow Systems with General Repair Times." In International Series in Operations Research & Management Science, 255–88. Boston, MA: Springer US, 2003. http://dx.doi.org/10.1007/978-1-4615-1019-2_11.

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Dengiz, Berna, Merve Uzuner Sahin, and Kumru Didem Atalay. "Investigation of System Productivity with Fuzzy Availability Analysis Considering Failure and Repair Times." In Proceedings of the International Symposium for Production Research 2018, 737–43. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-92267-6_59.

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Tananko, Igor E., and Nadezhda P. Fokina. "An Analysis Method of Queueing Networks with a Degradable Structure and Non-zero Repair Times of Systems." In Information Technologies and Mathematical Modelling. Queueing Theory and Applications, 184–94. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-97595-5_15.

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van der Heijden, Matthieu. "A simple algorithm for the system reliability in the 1-out-of-n system with exponential repair times." In Operations Research Proceedings, 264. Berlin, Heidelberg: Springer Berlin Heidelberg, 1989. http://dx.doi.org/10.1007/978-3-642-74862-2_72.

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Weik, Martin H. "time to repair." In Computer Science and Communications Dictionary, 1792. Boston, MA: Springer US, 2000. http://dx.doi.org/10.1007/1-4020-0613-6_19682.

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Weik, Martin H. "mean repair time." In Computer Science and Communications Dictionary, 991. Boston, MA: Springer US, 2000. http://dx.doi.org/10.1007/1-4020-0613-6_11234.

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Conference papers on the topic "Times to repair"

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Gokhale, Swapna S., and Robert Mullen. "Software defect repair times." In the 4th international workshop. New York, New York, USA: ACM Press, 2008. http://dx.doi.org/10.1145/1370788.1370810.

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Mally, Timothy, Michael W. Keller, Mahdi Kiani, Roger Walker, and Christopher W. Burnworth. "Finite Element Analysis and Test Verification of Composite Repair Length on Corrosion Defects." In 2016 11th International Pipeline Conference. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/ipc2016-64653.

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Engineered composite repairs are rapidly gaining traction as an alternative pipeline integrity repair method. These repair systems are being used to repair corrosion, erosion, dents, wrinkle bends, mechanical damage, and other anomalies that commonly occur on pipelines. Composites possess many significant advantages when compared to traditional metallic repairs. One of the most critical benefits of composites is that most composite repairs are fabricated on-site by installing an uncured composite that subsequently cures. This cure-in-place approach enables the production of repairs that can conform to complex geometries. Conformability allows for the reinforcement of damaged piping and pressure vessels that were difficult, or impossible, to repair with rigid metallic sleeves. While composites offer improved performance and reduced installation times for complex geometries, the engineering and installation of these repair systems is not as straightforward. Many areas of the methodology used to design composite repair systems are active areas of research. One of the current areas of discussion is the distance a repair must extend past a non-through-wall defect. The current nonmetallic repair standards, ASME PCC-2 Article 4.1 [1] and ISO/TS 24817 [2], suggest that a composite repair should extend a varying length past the defect in each direction, based on either the diameter and thickness of the pipe to be repaired or the stiffness of the composite. For the case of through-wall defects, the design methodology is based on the lap-shear strength of the composite and generally leads to repairs that extend farther beyond the defect when compared with non-through wall repiars. For this damage scenario, the presence of an extended repair area is considered an additional factor of safety. However, for non-leaking external defects, there is some debate as to whether the standard-prescribed, minimum repair length is required. This paper investigates a comparison of the minimum repair length required by ASME PCC-2 Equation 17 versus a shorter overlap length of 2 inches. Finite Element Analysis is used to model the difference in the two repair approaches. The FEA model is then verified by a hydrotest on a full-scale spool repair. Six specimens are machined to 75% wall loss and repaired with an engineered composite solution. The defect design for these repairs is adopted from guidance in ASME PCC-2. After installation of the repair, the pipe spool is then subjected to a hydrotest to 100% SMYS. After the 100% SMYS test, the specimens were ruptured in order to compare the ultimate strengths of the two repair approaches. All test results are compared using appropriate statistical approaches to determine significance (α = 0.05).
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Sei Kato and Takayuki Osogami. "Evaluating availability under quasi-heavy-tailed repair times." In 2008 IEEE International Conference on Dependable Systems and Networks With FTCS and DCC (DSN). IEEE, 2008. http://dx.doi.org/10.1109/dsn.2008.4630115.

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Ohler, Philipp, Sybille Hellebrand, and Hans-Joachim Wunderlich. "Analyzing Test and Repair Times for 2D Integrated Memory Built-in Test and Repair." In 2007 IEEE Design and Diagnostics of Electronic Circuits and Systems. IEEE, 2007. http://dx.doi.org/10.1109/ddecs.2007.4295278.

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Alexander, Chris, Brent Vyvial, and Fred Wilson. "Pipeline Repair of Corrosion and Dents: A Comparison of Composite Repairs and Steel Sleeves." In 2014 10th International Pipeline Conference. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/ipc2014-33410.

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When pipeline repairs are made on high pressure onshore transmission pipelines, in modern times repairs typically involve steel sleeves or composite repair systems. A comprehensive testing program was conducted to evaluate the repair of severe corrosion and dents using composite materials, as well as Type A and B steel sleeves. Full-scale destructive testing was performed including cyclic pressure loading and burst testing. Along with testing to failure, strain gages installed beneath the repairs were used to quantify the level of reinforcement provided by the respective repair systems. In this seminal body of work, operators are given information that provides a direct comparison between these competing repair technologies. The fundamental objective in testing was to determine the service life of the competing repair technologies, although of specific interest in this study was an effort to qualify the relative performance of the composite repairs and steel sleeves. The authors also utilized the test results to quantify the service lives of the repaired anomalies based on the operating conditions of actual pipeline systems.
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Rao, Liangxin, and Minqing Gong. "Availability for repairable series systems with random repair times." In 2011 9th International Conference on Reliability, Maintainability and Safety (ICRMS 2011). IEEE, 2011. http://dx.doi.org/10.1109/icrms.2011.5979394.

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Hill, Paul, Troy Swankie, Robert Bood, and Dina Mihsein. "Repair and Reinforcement of Blunt Defects on Pipeline Bends Using Composite Materials." In 2020 13th International Pipeline Conference. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/ipc2020-9290.

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Abstract Previous research on the use of composite repair systems has focused on the repair of damage to straight sections. This paper reports verification testing completed on composite repairs for pipeline bends to support development of a safe and consistent approach that ensures an equal level of performance is maintained over the entire system. A series of finite element analyses were completed that considered the effects of bend size (diameter and wall thickness), material grade, bend radius and angle. From this work 90° , 1.5D, 12” NB, X52 bends were selected for test. The objective was to demonstrate restoration of the fatigue life of the pipe to acceptable levels rather than just considering burst pressure. Defects equal to 0.5 times the diameter axially and 0.25 times the diameter radially were machined into the intrados of the bend (the location of highest hoop stress). Wall losses of 20% and 80% were replicated. Bounding repair thicknesses were tested to confirm performance was predictable. Aggressive cyclic pressure ranges of 125Nmm−2 and 90mm−2 were applied to the repaired defects, with the lower stress range loaded for a larger number of cycles. A successful test was defined as one which exceeded the target number of cycles by a factor of 10 AND for which there was no visual sign of repair degradation. The number of load cycles was selected to ensure the repaired lines satisfied the slope of the S-N curve for pristine pipe, confirming the approach maintained the required margin of safety applicable to the rest of the system. A design method is proposed that addresses weaknesses in the methods given in ISO 24817 and ASME PCC-2 Article 401. It is proposed that this be adopted by the standards for repairs to high pressure gas transmission pipelines to ensure equality of performance with undamaged sections.
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Xu, Shuzhen, and Enrique Susemihl. "Reliability Metrics of ReduNdant Systems With Log-Normal Repair Times." In ASME 2006 International Mechanical Engineering Congress and Exposition. ASMEDC, 2006. http://dx.doi.org/10.1115/imece2006-13169.

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The data usually available related to equipment failure and repair are the MTTF (mean time to failure) and MTTR (mean time to repair), with the underlying distributions assumed exponential. The analysis of repairable redundant systems can then proceed by means of integration of Markhov transition equations. It has been found that although the exponential distribution may represent adequately the failure probability, in some cases the log-normal distribution better represents the repair probability, but this distribution leads to non-Markhovian systems. The reliability of redundant systems is affected by the distribution used to model the repair time. This paper presents a comparison of the reliability metrics for redundant systems with exponential failure distribution and two cases of repair time distributions, i.e., exponential and log-normal. The exponential failure distribution is analyzed by integration of the Markhov transition equations, and the log-normal distribution by Monte Carlo simulation. The results obtained show that the use of exponential repair distributions when the data follows the log-normal distribution overestimates the reliability of the system. Nevertheless for values of the MTTR relatively small compared to the MTTF, 10% or lower, the results obtained by using exponential failure distributions are acceptable for engineering applications.
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Yan, Jiahao, and Kaigui Xie. "Repair Task Scheduling of Transmission Systems Considering Conditional Setup Times." In 2019 IEEE Power & Energy Society General Meeting (PESGM). IEEE, 2019. http://dx.doi.org/10.1109/pesgm40551.2019.8973993.

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Kala, Martin, Andrej Lalis, and Peter Vittek. "Optimizing Calculation of Maintenance Revision Times in Maintenance Repair Organizations." In 2019 International Conference on Military Technologies (ICMT). IEEE, 2019. http://dx.doi.org/10.1109/miltechs.2019.8870132.

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Reports on the topic "Times to repair"

1

L. C. Cadwallader. Review of Maintenance and Repair Times for Components in Technological Facilities. Office of Scientific and Technical Information (OSTI), November 2012. http://dx.doi.org/10.2172/1057703.

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Centeno, Grisselle. Repair Time Standards for Transit Vehicles. Tampa, FL: University of South Florida, September 2002. http://dx.doi.org/10.5038/cutr-nctr-rr-2002-16.

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Fu, Gongkang. Evaluation of Illinois Bridge Deterioration Models. Illinois Center for Transportation, September 2021. http://dx.doi.org/10.36501/0197-9191/21-029.

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The National Bridge Inventory bridge inspection system ranks the condition of bridge components on a scale of zero to nine. The resulting condition ratings represent an important element considered in deciding measures for bridge maintenance, repair, and rehabilitation. Thus, forecasting future condition ratings well is critical to reliable planning for these activities and estimating the costs. The Illinois Department of Transportation currently has deterministic models for this purpose. This study’s objective is to review the current models using condition rating histories gathered from 1980 to 2020 in Illinois for the following bridge components: deck, superstructure, substructure, culvert, and deck beam. The results show the current Illinois Department of Transportation models are inadequate in forecasting condition ratings, producing overestimates of the transition times between two condition rating levels for these components / systems, except for the deck beam, which is underestimated. It is recommended that the mean transition times found in this study from condition rating histories are used to replace the current models as a short-term solution. Further research is recommended to develop probabilistic models as a long-term solution to address observed significant variation or uncertainty in condition rating and transition times between condition rating levels.
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D'Ambrosio, Bruce. Real-Time Value-Driven Monitoring and Repair. Fort Belvoir, VA: Defense Technical Information Center, December 1992. http://dx.doi.org/10.21236/ada260959.

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Centeno, Grisselle. Development of Repair Time Standards for Engine and Transmission (Power Plant) Replacement of Transit Vehicles. Tampa, FL: University of South Florida, October 2006. http://dx.doi.org/10.5038/cutr-nctr-rr-2005-06.

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