Log in

Relevant bibliographies by topics / Bottleneck analysis / Journal articles

To see the other types of publications on this topic, follow the link: Bottleneck analysis.

Journal articles on the topic 'Bottleneck analysis'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 journal articles for your research on the topic 'Bottleneck analysis.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.

1

Lei, Qi, and Tong Li. "Identification approach for bottleneck clusters in a job shop based on theory of constraints and sensitivity analysis." Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture 231, no. 6 (May 1, 2015): 1091–101. http://dx.doi.org/10.1177/0954405415583884.

Full text

Abstract:

Manufacturing systems are constrained by one or more bottlenecks. Reducing bottlenecks improves the entire system. Finding bottlenecks, however, is a difficult task. In this study, a new bottleneck detection method based on theory of constrains and sensitivity analysis is presented to overcome the disadvantages of existing bottleneck identification methods for a job shop. First, a bottleneck index matrix is obtained by examining the sensitivity of system production performance to the capacity of each machine. Technique for order preference by similarity to ideal solution is then employed to calculate the comprehensive bottleneck index of each machine. Based on the calculation result, bottleneck machine clusters under different hierarchies are obtained through hierarchical cluster analysis. The designed identification approach, as a prior-to-run method, can identify bottleneck machine clusters under different hierarchies before the overall system circulation, thereby providing good guidance for subsequent production optimization. Finally, a set of job-shop scheduling problem benchmarks with different scales is selected for comparison between the proposed approach and existing approaches, such as, the shifting bottleneck detection method, the bottleneck detection method based on orthogonal experiment, and the bottleneck cluster identification method. By comparison, the proposed approach is proven to be credible and superior.

APA, Harvard, Vancouver, ISO, and other styles

2

Buddas, Henrietta. "A bottleneck analysis in the IFRC supply chain." Journal of Humanitarian Logistics and Supply Chain Management 4, no. 2 (October 7, 2014): 222–44. http://dx.doi.org/10.1108/jhlscm-10-2013-0036.

Full text

Abstract:

Purpose – The purpose of this paper is to further the understanding of bottlenecks occurring when preparing for humanitarian operations in the humanitarian supply chain. The focus in this paper is set on the activities of aid supply procurement and aid consolidation into standardised deliveries of humanitarian aid. Design/methodology/approach – The paper follows a qualitative case study and builds a theoretical bottleneck analysis framework, using, e.g. the theory of constraints as an important building block. The case study as such involves the IFRC supply chain. Findings – The findings in the empirical study show that there is a need for long-term planning (practical and strategic planning) of the supply procurement, as well as organisational commitment in order to remove bottlenecks in a humanitarian operation. Research limitations/implications – The research framework built for the case study is applicable in similar future analyses of humanitarian supply chain operations and projects, as well as modifiable to other types of project or operation analyses. Practical implications – This paper gives a wide perspective insight into constraining bottleneck areas as well as areas of improvement in disaster preparedness. Additionally the paper provides an applicable tool for humanitarian practitioners to use for analysing process bottlenecks, to decide on corrective actions. Originality/value – The paper constructs a bottleneck analysis framework, which can be utilised beyond the humanitarian setting. Bottleneck analyses have not previously been conducted within the humanitarian context.

APA, Harvard, Vancouver, ISO, and other styles

3

Lawrence, Stephen R., and Arnold H. Buss. "Economic analysis of production bottlenecks." Mathematical Problems in Engineering 1, no. 4 (1995): 341–63. http://dx.doi.org/10.1155/s1024123x95000202.

Full text

Abstract:

The management of bottlenecks has become a central topic in the planning and control of production systems. In this paper, we critically analyze bottlenecks from an economic perspective. Using a queueing network model, we demonstrate that bottlenecks are inevitable when there are differences in job arrival rates, processing rates, or costs of productive resources. These differences naturally lead to the creation of bottlenecks both for facilities design and demand planning problems. To evaluate bottlenecks from an economic perspective, we develop the notion of an “economic bottleneck,” which defines resources as bottlenecks based on economic, rather than physical, characteristics.

APA, Harvard, Vancouver, ISO, and other styles

4

Huntsinger, Leta F., and Nagui M. Rouphail. "Bottleneck and Queuing Analysis." Transportation Research Record: Journal of the Transportation Research Board 2255, no. 1 (January 2011): 117–24. http://dx.doi.org/10.3141/2255-13.

Full text

APA, Harvard, Vancouver, ISO, and other styles

5

Tang, Li, Yifeng Wang, and Xuejun Zhang. "Identifying Recurring Bottlenecks on Urban Expressway Using a Fusion Method Based on Loop Detector Data." Mathematical Problems in Engineering 2019 (August 18, 2019): 1–9. http://dx.doi.org/10.1155/2019/5861414.

Full text

Abstract:

The accurate identification of recurrent bottlenecks has been an important assumption of many studies on traffic congestion analysis and management. As one of the most widely used traffic detection devices, loop detectors can provide reliable multidimensional data for traffic bottleneck identification. Although great efforts have been put on developing bottleneck identification methods based on loop detector data, the existing studies are less informative with respect to providing accurate position of the bottlenecks and discussing the algorithm efficiency when facing with large amount of real-time data. This paper aims at improving the quality of bottleneck identification as well as avoiding excessive data processing burden. A fusion method of loop detector data with different collection cycles is proposed. It firstly determines the occurrence and the approximate locations of bottlenecks using large cycle data considering its high accuracy in determining bottlenecks occurrence. Then, the small cycle data are used to determine the accurate location and the duration time of the bottlenecks. A case study is introduced to verify the proposed method. A large set of 30 s raw loop detector data from a selected urban expressway segment in California is used. Also, the identification result is compared with the classical transformed cumulative curves method. The results show that the fusion method is valid with bottleneck identification and location positioning. We finally conclude by discussing some future improvements and potential applications.

APA, Harvard, Vancouver, ISO, and other styles

6

Öğüt, K. Selçuk, and James H. Banks. "Stability of Freeway Bottleneck Flow Phenomena." Transportation Research Record: Journal of the Transportation Research Board 1934, no. 1 (January 2005): 108–15. http://dx.doi.org/10.1177/0361198105193400111.

Full text

Abstract:

Data for 44 days from five extended freeway sections around bottlenecks in the San Diego, California, area were analyzed to determine the stability of the point of initial flow breakdown and the feasibility of using similar data for more extensive research into the stability of bottleneck flow phenomena. The ultimate goal of such research is to shed light on the nature of transitions from uncongested to congested flow. Analysis of speed drop sequences suggests that there is rarely a single bottleneck location within critical freeway sections. This in turn suggests that many bottlenecks should be thought of as extended sections rather than points or isolated segments. This suggests an understanding of flow transitions intermediate between the conventional view that flow breaks down consistently at a few locations and the view that flow breakdown is spontaneous and that congested flow is self-organized. Data similar to those used in this study are adequate, but not ideal, for further investigation of the stability of bottleneck flow phenomena. Specific limitations relate to the locations of detector stations and the presence of chronic data errors. This approach to the study of bottlenecks can be improved by combining direct observation with analysis of loop detector data and by using cumulative flow counts to estimate changes in the numbers of vehicles stored in freeway segments.

APA, Harvard, Vancouver, ISO, and other styles

7

Zahraee, Seyed Mojib, Saeed Rahimpour Golroudbary, Ahmad Hashemi, Jafar Afshar, and Mohammadreza Haghighi. "Simulation of Manufacturing Production Line Based on Arena." Advanced Materials Research 933 (May 2014): 744–48. http://dx.doi.org/10.4028/www.scientific.net/amr.933.744.

Full text

Abstract:

One of the controversial issues in manufacturing systems is bottleneck. Managers and engineers are trying to find methods to eliminate the bottlenecks and waiting times in the production line. More over the manufacturing companies are striving to sustain their competiveness by decreasing the bottlenecks, total cost and increasing the productivity. The objective of this study is applying the computer simulation to analysis the production line bottlenecks. To achieve this goal a color manufacturing line was selected as a case study and the basic application of arena 13.9 software. Finally the some modifications in the simulation model are proposed to improve the production line as well as to decrease the bottleneck.

APA, Harvard, Vancouver, ISO, and other styles

8

Yagar, Sam, and Richard Hui. "Systemwide Analysis of Freeway Improvements." Transportation Research Record: Journal of the Transportation Research Board 1554, no. 1 (January 1996): 172–83. http://dx.doi.org/10.1177/0361198196155400121.

Full text

Abstract:

Determining where to restripe or widen freeway sections to strategically relieve bottlenecks is a far more complicated problem than simply estimating the local capacity effects of specific lane additions. The pros and cons of reducing lane and shoulder widths to obtain an extra travel lane are discussed, with an emphasis on the effects on the overall freeway system. This study describes how increasing capacity at an upstream location can overload a downstream bottleneck and cause flow breakdown. An evaluation of potential local improvements at a number of existing bottlenecks in the westbound Highway 401 corridor in Toronto is provided; it finds that in a systems context about one-half are worthwhile, and the others have net negative effects.

APA, Harvard, Vancouver, ISO, and other styles

9

Shen, Ren Jie, Yan Yan Liang, and Jing Zhang. "Sensitive Analysis of Water-Network." Advanced Materials Research 433-440 (January 2012): 1302–6. http://dx.doi.org/10.4028/www.scientific.net/amr.433-440.1302.

Full text

Abstract:

As a weak point, bottleneck plays a crucial role in improving the property of the whole water system. In this paper, sensitivity computation formula is defined and corresponding mathematical model is established to confirm the bottleneck of water network. And the case proves that the bottleneck streams and units can be easily confirmed by the method in this paper.

APA, Harvard, Vancouver, ISO, and other styles

10

Davy, Christina M., and Robert W. Murphy. "Conservation genetics of the endangered Spotted Turtle (Clemmys guttata) illustrate the risks of “bottleneck tests”." Canadian Journal of Zoology 92, no. 2 (February 2014): 149–62. http://dx.doi.org/10.1139/cjz-2013-0188.

Full text

Abstract:

Studies of population genetics in turtles have suggested that turtles do not experience genetic impacts of bottlenecks as strongly as expected. However, recent studies cast doubt on two commonly used tests implemented in the program BOTTLENECK, suggesting that these findings should be re-evaluated. The Spotted Turtle (Clemmys guttata (Schneider, 1792)) is endangered both globally and within Canada, but genetic data required to develop effective recovery strategies are unavailable. Here, we conducted the first study of population genetic structure in C. guttata. We then used multiple small populations of C. guttata as replicates to test whether the commonly used program BOTTLENECK could detect the genetic signature of bottlenecks in our study populations, which are all thought to have experienced significant declines in the past 2–3 generations (75 years). Turtles (n = 256) were genotyped at 11 microsatellite loci. A suite of Bayesian population genetics analyses and a principal coordinates analysis identified a minimum of 6 distinct genetic populations and a maximum of 10 differentiated subpopulations across the sampled Canadian range of C. guttata, which corresponded to demographically independent units. BOTTLENECK failed to detect population declines. A literature review found that bottleneck tests in 17 of 18 previous genetic studies of tortoises and freshwater turtles were based on suboptimal sampling, potentially confounding their results. High retention of genetic diversity (allelic richness and heterozygosity) in isolated populations of C. guttata and other turtle species is encouraging for species recovery, but conclusions about the prevalence of genetic bottlenecks in such populations should be re-examined.

APA, Harvard, Vancouver, ISO, and other styles

11

Erera, Alan L., Tim W. Lawson, and Carlos F. Daganzo. "Simple, Generalized Method for Analysis of Traffic Queue Upstream of a Bottleneck." Transportation Research Record: Journal of the Transportation Research Board 1646, no. 1 (January 1998): 132–40. http://dx.doi.org/10.3141/1646-16.

Full text

Abstract:

An approach is generalized for enhancing a standard input-output diagram to represent graphically the time and distance that vehicles spend in a queue upstream of a bottleneck. The approach requires the construction of a curve depicting the cumulative number of vehicles to have reached the back of the queue as a function of time. The original technique, described in a previous paper, is reviewed for bottlenecks with constant capacity and for those where capacity changes once. The approach is then generalized to allow multiple changes in bottleneck capacity, and the original assumption of a triangular flow-density ( q-k) relation is relaxed to one that is piecewise-linear concave. Although it is consistent with the kinematic wave theory of traffic flow, the proposed approach is simpler to apply to complex problems because it avoids the laborious construction of a time-space diagram. It allows the estimation of several measures required in the evaluation of the impacts of bottlenecks, including the (accurate) number of vehicles in queue and the physical extents of queues at any time and the total time spent by vehicles in different traffic states.

APA, Harvard, Vancouver, ISO, and other styles

12

Urban, Wieslaw, and Patrycja Rogowska. "Methodology for bottleneck identification in a production system when implementing TOC." Engineering Management in Production and Services 12, no. 2 (July 23, 2020): 74–82. http://dx.doi.org/10.2478/emj-2020-0012.

Full text

Abstract:

AbstractFor TOC (Theory of Constraints) implementation in a production system, the determination of the system's bottleneck is a crucial step. Effective bottleneck identification allows setting priorities for the improvement of a production system. The article deals with a significant problem for the manufacturing industry related to the location of a bottleneck. The article aims for a detailed analysis of methods for bottleneck identification based on a comprehensive literature review and the design of a generalised methodology for bottleneck identification in the production system. The article uses two research methods, first, the combination of a narrative and scoping literature review, and second, the logical design. Several methods for bottleneck identification are reviewed and compared, finding some being similar, and others giving new insights into the evaluated production system. A methodology for bottleneck identification is proposed. It contains several detailed methods arranged in coherent steps, which are suggested to be followed when aiming for the recognition of a production system's bottleneck. The proposed methodology is expected to be helpful in the practical TOC implementation. The presented methodology for the identification of bottlenecks in a production system is a practical tool for managers and experts dealing with TOC. However, it is still a conceptual proposal that needs to be tested empirically. The proposed methodology for bottleneck identification is an original concept based on the current literature output. It contributes to the production management theory as a practical managerial tool.

APA, Harvard, Vancouver, ISO, and other styles

13

Bertini, Robert L., and Aaron M. Myton. "Use of Performance Measurement System Data to Diagnose Freeway Bottleneck Locations Empirically in Orange County, California." Transportation Research Record: Journal of the Transportation Research Board 1925, no. 1 (January 2005): 48–57. http://dx.doi.org/10.1177/0361198105192500106.

Full text

Abstract:

To improve freeway modeling and operations, it is important to understand how traffic conditions evolve in both time and space. The widespread availability of freeway sensor data makes detailed operational analysis possible in ways that were not available in the past. This study, inspired by several other studies of a 6-mi segment of Interstate 405 in Orange County, California, describes the evolution of traffic conditions over one morning peak period by using inductive loop detector data, including vehicle count and lane occupancy measured at 30-s intervals. With cumulative curves of vehicle count and occupancy, transformed in ways that enhanced their resolution, 10 bottleneck activations were identified in time and space over one morning peak period. At bottleneck activation, queue propagation was observed in generally predictable ways. Bottleneck outflows were carefully measured only while the bottlenecks were active, that is, while queued conditions persisted upstream and unqueued (freely flowing) conditions prevailed downstream. When bottlenecks were activated immediately following freely flowing conditions, outflow reductions were observed at queue formation. These reductions were consistent with those in previous studies. The study was limited in that only one day's data were analyzed and ramp data were not available on the day analyzed. Future research will include further analysis of the same site by using more recent data now that ramp counts are available in the California Performance Measurement System database. Understanding the mechanisms that lead to bottleneck activation is a critical step toward improving the understanding of how freeways function and is necessary for addressing operational issues. This clear understanding provides a foundation for determining ramp metering rates and addressing the freeway characteristics that cause bottlenecks to form.

APA, Harvard, Vancouver, ISO, and other styles

14

Jiang, Yong-Heng, Ling Wang, and Yi-Hui Jin. "Bottleneck analysis for network flow model." Advances in Engineering Software 34, no. 10 (October 2003): 641–51. http://dx.doi.org/10.1016/s0965-9978(03)00093-0.

Full text

APA, Harvard, Vancouver, ISO, and other styles

15

Kim, Jihun, Joonsung Kim, Pyeongsu Park, Jong Kim, and Jangwoo Kim. "SSD Performance Modeling Using Bottleneck Analysis." IEEE Computer Architecture Letters 17, no. 1 (January 1, 2018): 80–83. http://dx.doi.org/10.1109/lca.2017.2779122.

Full text

APA, Harvard, Vancouver, ISO, and other styles

16

Franz, Mark L., Michael L. Pack, Drew Lund, and Catherine Plaisant. "Visualization Tools for Traffic Bottleneck Analysis." International Journal of Transportation 5, no. 3 (December 31, 2017): 45–56. http://dx.doi.org/10.14257/ijt.2017.5.3.04.

Full text

APA, Harvard, Vancouver, ISO, and other styles

17

Wang, Lijun, Lin Cai, Xinzhi Liu, Xuemin (Sherman) Shen, and Junshan Zhang. "Stability analysis of multiple-bottleneck networks." Computer Networks 53, no. 3 (February 2009): 338–52. http://dx.doi.org/10.1016/j.comnet.2008.10.009.

Full text

APA, Harvard, Vancouver, ISO, and other styles

18

Ke, Qiao, Jiangshe Zhang, H. M. Srivastava, Wei Wei, and Guang-Sheng Chen. "Independent Component Analysis Based on Information Bottleneck." Abstract and Applied Analysis 2015 (2015): 1–8. http://dx.doi.org/10.1155/2015/386201.

Full text

Abstract:

The paper is mainly used to provide the equivalence of two algorithms of independent component analysis (ICA) based on the information bottleneck (IB). In the viewpoint of information theory, we attempt to explain the two classical algorithms of ICA by information bottleneck. Furthermore, via the numerical experiments with the synthetic data, sonic data, and image, ICA is proved to be an edificatory way to solve BSS successfully relying on the information theory. Finally, two realistic numerical experiments are conducted via FastICA in order to illustrate the efficiency and practicality of the algorithm as well as the drawbacks in the process of the recovery images the mixing images.

APA, Harvard, Vancouver, ISO, and other styles

19

Fabianova, Jana, Jaroslava Janekova, and Jozef Horbulak. "SOLVING THE BOTTLENECK PROBLEM IN A WAREHOUSE USING SIMULATIONS." Acta logistica 8, no. 2 (June 30, 2021): 107–16. http://dx.doi.org/10.22306/al.v8i2.209.

Full text

Abstract:

The uneven workload distribution and working time utilisation create a bottleneck, leading to inefficient utilisation of capacity and increased costs. A bottleneck is a limiting and risk factor for any business entity. In the case of a distribution warehouse, the bottleneck limits its ability to meet the requirements for sending an order within the required time limit. Delays at any phase of a distribution process may result in non-compliance with customer requirements. In solving capacity problems and bottlenecks elimination, computer simulations and optimisation are often used. The article presents a basic simulation analysis of workload distribution and work times, useful for logistics companies, thus for the area of human and financial resources. In the article, the use of simulations in the ExtendSim9 program to eliminate the bottleneck is discussed. The bottleneck is solved by experiments on a simulation model when optimal workers assignment to individual workplaces of the warehouse is sought. The two final proposals for workers allocation, with the current and increased number of workers, are compared in workforce utilisation and system stability. The simulation method allows verification of the proposals' impacts in advance and practically with no financial costs.

APA, Harvard, Vancouver, ISO, and other styles

20

Bertini, Robert L., Steven Hansen, and Klaus Bogenberger. "Empirical Analysis of Traffic Sensor Data Surrounding a Bottleneck on a German Autobahn." Transportation Research Record: Journal of the Transportation Research Board 1934, no. 1 (January 2005): 96–107. http://dx.doi.org/10.1177/0361198105193400110.

Full text

Abstract:

The evolution of traffic from freely flowing to queued conditions and from queued to freely flowing conditions was studied along a 14-km section of German Autobahn 9 near Munich. Several bottlenecks were identified by a systematic examination of the excess vehicle accumulation and excess travel time (delay) that arose between measurement locations. It is shown that a bottleneck arose repeatedly downstream of an on-ramp on a busy freeway. The analysis tools used were curves of cumulative vehicle arrival number versus time and curves of cumulative time-averaged velocity versus time. The data required to construct these curves were available in archived form from inductive loop detectors embedded in the freeway. These cumulative plots were carefully and systematically transformed to produce the resolution necessary to reveal important details of the evolution of traffic flow features. These high-resolution transformed curves have made it possible to identify key time-dependent features related to the activation and deactivation of the bottleneck.

APA, Harvard, Vancouver, ISO, and other styles

21

Zhao, Dongping, Xitian Tian, and Junhao Geng. "A Bottleneck Detection Algorithm for Complex Product Assembly Line Based on Maximum Operation Capacity." Mathematical Problems in Engineering 2014 (2014): 1–9. http://dx.doi.org/10.1155/2014/258173.

Full text

Abstract:

Because of the complex constraints in complex product assembly line, existing algorithms not always detect bottleneck correctly and they have a low convergence rate. In order to solve this problem, a hybrid algorithm of adjacency matrix and improved genetic algorithm (GA) was proposed. First, complex assembly network model (CANM) was defined based on operation capacity of each workstation. Second, adjacency matrix was proposed to convert bottleneck detection of complex assembly network (CAN) into a combinatorial optimization problem of max-flow. Third, an improved GA was proposed to solve this max-flow problem by retaining the best chromosome. Finally, the min-cut sets of CAN were obtained after calculation, and bottleneck workstations were detected according to the analysis of min-cut sets. A case study shows that this algorithm can detect bottlenecks correctly and its convergence rate is high.

APA, Harvard, Vancouver, ISO, and other styles

22

Sridevi, S. "Bottleneck Analysis of an Automobile Industry Component." Indian Journal of Science and Technology 8, no. 1 (January 20, 2015): 1–4. http://dx.doi.org/10.17485/ijst/2015/v8i31/84222.

Full text

APA, Harvard, Vancouver, ISO, and other styles

23

Leurent, Fabien, and Cyril Pivano. "Sensitivity Analysis of a Transit Bottleneck Model." Transportation Research Procedia 37 (2019): 433–40. http://dx.doi.org/10.1016/j.trpro.2018.12.213.

Full text

APA, Harvard, Vancouver, ISO, and other styles

24

Nadakuditi, Raj Rao, and Igor L. Markov. "On bottleneck analysis in stochastic stream processing." ACM Transactions on Design Automation of Electronic Systems 18, no. 3 (July 2013): 1–20. http://dx.doi.org/10.1145/2491477.2491478.

Full text

APA, Harvard, Vancouver, ISO, and other styles

25

Bukáček, M., P. Hrabák, and M. Krbálek. "Microscopic travel-time analysis of bottleneck experiments." Transportmetrica A: Transport Science 14, no. 5-6 (January 17, 2018): 375–91. http://dx.doi.org/10.1080/23249935.2017.1419423.

Full text

APA, Harvard, Vancouver, ISO, and other styles

26

Chiang, S. Y., C. T. Kuo, and S. M. Meerkov. "c-Bottlenecks in serial production lines: Identification and application." Mathematical Problems in Engineering 7, no. 6 (2001): 543–78. http://dx.doi.org/10.1155/s1024123x01001776.

Full text

Abstract:

The bottleneck of a production line is a machine that impedes the system performance in the strongest manner. In production lines with the so-called Markovian model of machine reliability, bottlenecks with respect to the downtime, uptime, and the cycle time of the machines can be introduced. The two former have been addressed in recent publications [1] and [2]. The latter is investigated in this paper. Specifically, using a novel aggregation procedure for performance analysis of production lines with Markovian machines having different cycle time, we develop a method for c-bottleneck identification and apply it in a case study to a camshaft production line at an automotive engine plant.

APA, Harvard, Vancouver, ISO, and other styles

27

Ahmed, Shamsuddin, and Francis Amagoh. "Process analysis and capacity utilization in a dental clinic in Kazakhstan." Competitiveness Review 24, no. 4 (August 12, 2014): 347–56. http://dx.doi.org/10.1108/cr-04-2013-0037.

Full text

Abstract:

Purpose – The purpose of this paper is to investigate the service delivery system of a dental clinic in Kazakhstan to maximize the clinic’s efficiency. Design/methodology/approach – The study uses process analysis to determine the capacity utilization and areas of bottlenecks in the dental clinic’s system. Findings – The analysis shows that the most severe bottleneck is identified in step 16 of the 20-step patient flow process. The system efficiency is approximately 62 per cent. Practical implications – The study will help similar health-care organizations identify areas of bottlenecks in their operational system. This would allow management to deploy optimal resources that would improve systems’ performance. Originality/value – The paper provides a framework for health-care managers to identify how to reduce patient throughput time and increase patient satisfaction.

APA, Harvard, Vancouver, ISO, and other styles

28

Cechlárová, Katarína. "Eigenvectors in bottleneck algebra." Linear Algebra and its Applications 175 (October 1992): 63–73. http://dx.doi.org/10.1016/0024-3795(92)90302-q.

Full text

APA, Harvard, Vancouver, ISO, and other styles

29

Slonim, Noam, Nir Friedman, and Naftali Tishby. "Multivariate Information Bottleneck." Neural Computation 18, no. 8 (August 2006): 1739–89. http://dx.doi.org/10.1162/neco.2006.18.8.1739.

Full text

Abstract:

The information bottleneck (IB) method is an unsupervised model independent data organization technique. Given a joint distribution, p(X, Y), this method constructs a new variable, T, that extracts partitions, or clusters, over the values of X that are informative about Y. Algorithms that are motivated by the IB method have already been applied to text classification, gene expression, neural code, and spectral analysis. Here, we introduce a general principled framework for multivariate extensions of the IB method. This allows us to consider multiple systems of data partitions that are interrelated. Our approach utilizes Bayesian networks for specifying the systems of clusters and which information terms should be maintained. We show that this construction provides insights about bottleneck variations and enables us to characterize the solutions of these variations. We also present four different algorithmic approaches that allow us to construct solutions in practice and apply them to several real-world problems.

APA, Harvard, Vancouver, ISO, and other styles

30

Ahmed, Ishtiak, Nagui M. Rouphail, and Shams Tanvir. "Characteristics and Temporal Stability of Recurring Bottlenecks." Transportation Research Record: Journal of the Transportation Research Board 2672, no. 42 (October 24, 2018): 235–46. http://dx.doi.org/10.1177/0361198118798991.

Full text

Abstract:

This study applies and updates a method which identifies and quantifies the extent of traffic congestion from recurring freeway bottlenecks. Additionally, the spatiotemporal stability of bottlenecks over an extended period was tested. Over time congestion at bottlenecks may increase, may decrease, or may migrate to other nearby locations. Analysis of stability is important since prioritizing and applying treatments at bottlenecks is a multiyear process. In addition, a robust method for selecting sensitivity based parameters to identify and quantify bottleneck effects is presented. Subsequently, a systematic framework is developed for tracking and archiving the spatiotemporal changes in the recurring bottlenecks. The proposed method is demonstrated on a case study on Interstate 40 in North Carolina using three years of probe data. A congestion speed ratio detection threshold of 0.7 and a probability of activation threshold of 33% for the study area were determined from a sensitivity test to ascertain their recurrence. The method identified 13 bottlenecks with their impacts ranging from 35 to 3,278 mi-hours of congestion per year. Eight bottlenecks either newly emerged or had their queues merged or shifted between successive years. Even spatially stable bottlenecks had significant variation in their activation frequency and queue length. Exploration of the changes in bottleneck severity and locations revealed the influence of a long-term work zone in the area and the effect of the rapid growth in traffic demand. Local agencies can use this method to shortlist recurring bottlenecks and track changes to plan mitigation strategies.

APA, Harvard, Vancouver, ISO, and other styles

31

Xu, Xiu Hua, Zheng Yi Ge, and Chao Gao. "Optimization and Simulation Analysis of City Bottleneck Sections Based on VISSIM." Applied Mechanics and Materials 438-439 (October 2013): 1868–72. http://dx.doi.org/10.4028/www.scientific.net/amm.438-439.1868.

Full text

Abstract:

As urban bottleneck sections are important reasons that contribute to urban traffic congestion, the effective solutions for them can greatly ease traffic congestion. After the convey of the present traffic and traffic flow of the Ba Liqiao segment of the Latitude 12th Road, which is the typical bottleneck section, the paper puts forward the optimization program and uses VISSIM to simulate the Ba Liqiao segment of Latitude the 12th Road of Jinan City. The optimized evaluation results of this bottleneck section are given out.

APA, Harvard, Vancouver, ISO, and other styles

32

Adrian, Juliane, Armin Seyfried, and Anna Sieben. "Crowds in front of bottlenecks at entrances from the perspective of physics and social psychology." Journal of The Royal Society Interface 17, no. 165 (April 2020): 20190871. http://dx.doi.org/10.1098/rsif.2019.0871.

Full text

Abstract:

This article presents an interdisciplinary study of physical and social psychological effects on crowd dynamics based on a series of bottleneck experiments. Bottlenecks are of particular interest for applications such as crowd management and design of emergency routes because they limit the performance of a facility. In addition to previous work on the dynamics within the bottleneck, this study focuses on the dynamics in front of the bottleneck, more specifically, at entrances. The experimental set-up simulates an entrance scenario to a concert consisting of an entrance gate (serving as bottleneck) and a corridor formed by barriers. The parameters examined are the corridor width, degree of motivation and priming of the social norm of queuing. The analysis is based on head trajectories and questionnaires. We show that the density of persons per square metre depends on motivation and also increases continuously with increasing corridor width, meaning that a density reduction can be achieved by a reduction of space. In comparison to other corridor widths observed, the narrowest corridor is rated as being fairer, more comfortable and as showing less unfair behaviour. Pushing behaviour is seen as ambivalent: it is rated as unfair and listed as a strategy for faster access.

APA, Harvard, Vancouver, ISO, and other styles

33

Šimon, Marek, Ladislav Huraj, and Vladimír Siládi. "Analysis of performance bottleneck of P2P grid applications." Journal of Applied Mathematics, Statistics and Informatics 9, no. 2 (December 1, 2013): 5–11. http://dx.doi.org/10.2478/jamsi-2013-0008.

Full text

Abstract:

Abstract The OurGrid distributed environment is an open source grid middleware that enables the creation of P2P computational grids to speed up the execution of bag-of-tasks applications. Bag-of-tasks is an application model composed of several independent tasks not communicating with each other during their execution, tolerating network delays and faults. The paper shows that the main advantage to avoid bottlenecks is if the data gets larger or computations become more complex and the conclusion is made based on the presented measurements. Understanding such patterns sheds an insightful light on performance bottlenecks and design tradeoffs for P2P Grid applications

APA, Harvard, Vancouver, ISO, and other styles

34

Majima, Takahiro, Keiki Takadama, Daisuke Watanabe, Taro Aratani, and Keiji Sato. "Transportation simulator for disaster circumstance and bottleneck analysis." Artificial Life and Robotics 23, no. 4 (October 3, 2018): 593–99. http://dx.doi.org/10.1007/s10015-018-0493-3.

Full text

APA, Harvard, Vancouver, ISO, and other styles

35

Wiendahl, H. P., and M. Hegenscheidt. "Bottleneck Analysis of Assembly Lines with Characteristic Curves." CIRP Annals 51, no. 1 (2002): 15–19. http://dx.doi.org/10.1016/s0007-8506(07)61456-5.

Full text

APA, Harvard, Vancouver, ISO, and other styles

36

Jin, Sheng, Dianhai Wang, and Dongfang Ma. "Empirical Analysis of Traffic Bottleneck at Beijing Expressways." Mathematical Problems in Engineering 2013 (2013): 1–7. http://dx.doi.org/10.1155/2013/254841.

Full text

Abstract:

The expressways in Beijing are confronted with more serious traffic congestions. Based on the survey data obtained from the typical sections at the expressways, the time dependent characteristics of traffic flow parameters were analyzed in detail and the data gap was found in this paper. The Fast Fourier Transform (FFT) method is proposed to transfer the data of traffic flow parameters for describing the fluctuation characteristics of traffic flow. Two methods of identification, the graph method and the control line method, were proposed as to the change time of traffic bottleneck forming and dissipating. The findings in this paper have already been applied in traffic management and ramp control at the expressways in Beijing.

APA, Harvard, Vancouver, ISO, and other styles

37

Das, Shantanu, and David Levinson. "Queuing and Statistical Analysis of Freeway Bottleneck Formation." Journal of Transportation Engineering 130, no. 6 (November 2004): 787–95. http://dx.doi.org/10.1061/(asce)0733-947x(2004)130:6(787).

Full text

APA, Harvard, Vancouver, ISO, and other styles

38

Chen, Hong, and Avi Mandelbaum. "Discrete Flow Networks: Bottleneck Analysis and Fluid Approximations." Mathematics of Operations Research 16, no. 2 (May 1991): 408–46. http://dx.doi.org/10.1287/moor.16.2.408.

Full text

APA, Harvard, Vancouver, ISO, and other styles

39

Koltai, T. "Fixed cost oriented bottleneck analysis with linear programming." Omega 23, no. 1 (February 1995): 89–95. http://dx.doi.org/10.1016/0305-0483(94)00053-d.

Full text

APA, Harvard, Vancouver, ISO, and other styles

40

Prihatini, Ike Johan, Sri Achadi Nugraheni, and Sutopo Patria Jati. "Bottleneck Pelayanan Nifas pada Upaya Penurunan Risiko Kejadian Kematian Ibu di Wilayah Dinas Kesehatan Kota Semarang." Jurnal Manajemen Kesehatan Indonesia 5, no. 3 (December 31, 2017): 28–35. http://dx.doi.org/10.14710/jmki.5.3.2017.28-35.

Full text

Abstract:

Maternal and child health was a priority of health program in Indonesia. Maternal Mortality Rate in Semarang was ranked second highest in Central Java. The highest proportion of maternal deaths occurred during puerperium. That’s indicates, there was a problem in a process of maternal health services during puerperium period in health facilities. This study was conducted to examine constraints on health systems that limit range of interventions or health services that were important for postpartum, bottlenecks related to postpartum services in Public Health Center (PHC), especially infrastructure, human resources, access to PHC, post partum visits (KF1 and KF3), as well as quality of post partum services on risk reduction of maternal mortality. This case study used a qualitative approach. Data collection through interviews to five midwives as main informants, 5 midwives coordinator and 5 heads of PHC as informant triangulation. Data analsyis used content analysis method, then assigned priority bottleneck through MCUA (Multiple Criteria Utility Assessment) techniques. WHO's scale-up BNA plan to analyze bottleneck causes. Results showed, there was a bottleneck on childbirth services in PHC. The causes of bottleneck risk reduction efforts of maternal mortality incidence in puerperium period has never been analyzed workload of health personnel in PHC, lack of monitoring and evaluation of an availability infrastructure facilities in PHC, there has not been regular training, especially on delivery until puerperium services, and PHC has not received more detailed and operational information about puerperium so their maternal knowledge about puerperium has not increased much and couldn’t raise mother's awareness to do so. Semarang Public Health Office (Dinas Kesehatan Kota Semarang) needs to conduct periodic monitoring and evaluation implementation of postpartum services and improve quality of childbirth services in PHC.Keywords: Bottleneck analysis, health services, post partum, Primary Health Care, Puskesmas, Maternal Mortality Rate

APA, Harvard, Vancouver, ISO, and other styles

41

Ali, Akhtar, Hongye Li, William L. Schneider, Diana J. Sherman, Stewart Gray, Dawn Smith, and Marilyn J. Roossinck. "Analysis of Genetic Bottlenecks during Horizontal Transmission of Cucumber Mosaic Virus." Journal of Virology 80, no. 17 (September 1, 2006): 8345–50. http://dx.doi.org/10.1128/jvi.00568-06.

Full text

Abstract:

ABSTRACT Genetic bottlenecks may occur in virus populations when only a few individuals are transferred horizontally from one host to another, or when a viral population moves systemically from the infection site. Genetic bottlenecks during the systemic movement of an RNA plant virus population were reported previously (H. Li and M. J. Roossinck, J. Virol. 78:10582-10587, 2004). In this study we mechanically inoculated an artificial population consisting of 12 restriction enzyme marker mutants of Cucumber mosaic virus (CMV) onto young leaves of squash plants and used two aphid species, Aphis gossypii and Myzus persicae, to transmit the virus populations from infected source plants to healthy squash plants. Horizontal transmission by aphids constituted a significant bottleneck, as the population in the aphid-inoculated plants contained far fewer mutants than the original inoculum source. Additional experiments demonstrated that genetic variation in the artificial population of CMV is not reduced during the acquisition of the virus but is significantly reduced during the inoculation period.

APA, Harvard, Vancouver, ISO, and other styles

42

Knop, Krzysztof. "Elimination of constraints in the production process of power equipment components and the analysis of the resulting benefits." Production Engineering Archives 24, no. 24 (September 1, 2019): 37–42. http://dx.doi.org/10.30657/pea.2019.24.09.

Full text

Abstract:

Abstract The article presents the results regarding the elimination of constraints in the production process of a power equipment subassembly, a boiler chamber, together with an analysis of the benefits resulting from this, both financial and non-financial. The significance of bottlenecks in the production process, ways of its identification and limitations - in general - are presented. The article is a case-study of an attempt to eliminate the bottleneck in the production process of the boiler chamber, which turned out to be the process of drilling and marking-off, and work stations representing these processes. In order to eliminate the limitation, it was decided to replace the existing tracing and drilling work with a numerically controlled device - a boring machine moved from the liquidated department.. As a result, labor-intensive, manual chambers marking-off and the process of drilling holes with a smaller diameter drill have been eliminated. A number of benefits has been demonstrated resulting from the elimination of the bottleneck in the process, first of all, it was possible to reduce the duration of the marking-off and drilling operations and reduce the costs of the boiler chamber production process.

APA, Harvard, Vancouver, ISO, and other styles

43

Eldridge, Mark D. B., Catherine Rummery, Cherylin Bray, Kyall R. Zenger, Teena L. Browning, and Robert L. Close. "Genetic analysis of a population crash in brush-tailed rock-wallabies (Petrogale penicillata) from Jenolan Caves, south-eastern Australia." Wildlife Research 31, no. 3 (2004): 229. http://dx.doi.org/10.1071/wr03030.

Full text

Abstract:

Although the theoretical effects of a severe reduction in effective population size (i.e. a bottleneck) are well known, relatively few empirical studies of bottlenecks have been based on extensive temporally spaced samples of a population both before and after a bottleneck. Here we describe the results of one such study, utilising the Jenolan Caves (JC) population of the brush-tailed rock-wallaby (Petrogale penicillata). When first sampled in 1985 (n = 20) the JC population comprised ~90 individuals. Subsequently the population crashed, and by 1992 only seven individuals remained. In 1996 the entire population (n = 10) was again sampled. Genetic diversity in the pre- and post-crash JC population was compared using 11 polymorphic microsatellite loci and PCR–SSCP analysis of the mitochondrial DNA control region. Only a single unique control region haplotype was detected in the pre- and post-crash JC population, although variant haplotypes were present in other P. penicillata populations. Of the 35 microsatellite alleles present in the pre-crash population, nine (26%) were lost during the bottleneck. The average number of rare alleles declined by 72%, allelic diversity was reduced by 30% and average heterozygosity declined by 10%. These observations are consistent with theoretical predictions. Additional analyses revealed that a P.�penicillata female at Wombeyan Caves was the only survivor of a 1990/91 reintroduction attempt using animals from JC. Of the microsatellite alleles detected in this female, 21% (4/19) were no longer present in the post-crash JC population. Furthermore, the genetic profiles of animals from the recently discovered Taralga population indicate that they are not derived from JC stock, but represent a threatened remnant of a hitherto undetected natural P. penicillata population.

APA, Harvard, Vancouver, ISO, and other styles

44

Miricǎ, Ştefan. "Optimal feedback control for a class of bottleneck problems." Journal of Mathematical Analysis and Applications 112, no. 1 (November 1985): 221–35. http://dx.doi.org/10.1016/0022-247x(85)90287-2.

Full text

APA, Harvard, Vancouver, ISO, and other styles

45

Ignacio, Paul Samuel, Jay-Anne Bulauan, and David Uminsky. "Lumáwig: An Efficient Algorithm for Dimension Zero Bottleneck Distance Computation in Topological Data Analysis." Algorithms 13, no. 11 (November 11, 2020): 291. http://dx.doi.org/10.3390/a13110291.

Full text

Abstract:

Stability of persistence diagrams under slight perturbations is a key characteristic behind the validity and growing popularity of topological data analysis in exploring real-world data. Central to this stability is the use of Bottleneck distance which entails matching points between diagrams. Instances of use of this metric in practical studies have, however, been few and sparingly far between because of the computational obstruction, especially in dimension zero where the computational cost explodes with the growth of data size. We present a novel efficient algorithm to compute dimension zero bottleneck distance between two persistent diagrams of a specific kind which runs significantly faster and provides significantly sharper approximates with respect to the output of the original algorithm than any other available algorithm. We bypass the overwhelming matching problem in previous implementations of the bottleneck distance, and prove that the zero dimensional bottleneck distance can be recovered from a very small number of matching cases. Partly in keeping with nomenclature traditions in this area of TDA, we name this algorithm Lumáwig as a nod to a deity in the northern Philippines, where the algorithm was developed. We show that Lumáwig generally enjoys linear complexity as shown by empirical tests. We also present an application that leverages dimension zero persistence diagrams and the bottleneck distance to produce features for classification tasks.

APA, Harvard, Vancouver, ISO, and other styles

46

Zhai, Hui Juan, Huan Huan Qiao, and Guan Qing Wang. "Analysis of Sustainable Development of Inner Mongolia Wind Power." Applied Mechanics and Materials 110-116 (October 2011): 2421–25. http://dx.doi.org/10.4028/www.scientific.net/amm.110-116.2421.

Full text

Abstract:

Inner Mongolia region is vast, and developable wind resource accounts for 50%. However, wind power grid has become the local wind development's main bottleneck. Therefore, studying the sustainability of wind power in this region has very important significance. This article from aspects of resource conditions, economic growth, wind power transmission, technical strength and policy environment analyzes the sustainability of Inner Mongolia wind power generation, then draws the conclusion that the bottleneck problem is expected to be solved and the sustainable development is expected to be realized.

APA, Harvard, Vancouver, ISO, and other styles

47

El-Khalil, Raed. "Simulation analysis for managing and improving productivity." Journal of Manufacturing Technology Management 26, no. 1 (February 2, 2015): 36–56. http://dx.doi.org/10.1108/jmtm-03-2013-0024.

Full text

Abstract:

Purpose – The current economic crisis increased the demand on management to improve process efficiency. The purpose of this paper is to identify and resolve inefficiencies within the car assembly system utilizing discrete simulation modeling and analysis in order to improve productivity at one of the original equipment manufacturers (OEM) body shops in North America. Design/methodology/approach – This research was driven by a manager’s recommendation from one of the Big Three (GM, Ford, Chrysler LLC) companies in order to improve operational performance. The data utilized in creating the simulation model was obtained from one of the assembly facilities that produce three different vehicles over a period of one year. All model simulation, inputs and outputs were discussed and agreed upon by facility management. Findings – The established base model was verified and validated to mimic the actual facility outputs indicating all process bottlenecks. Two model scenarios were considered: the first scenario focussed on the top bottleneck processes flexibility with a ROI of 497 percent, while the second considered changing the model mix percentage leading to a cost improvement of $1.6 million/annually. Research limitations/implications – The model only considered management decision on buffer sizes, batch size and the top bottleneck station alternatives to make improvements. Simulating improvements in labor efficiency, robots uptime, scrap root cause, and maintenance response to downtime where not considered. Practical implications – This paper indicated the importance of discrete simulation modeling in providing alternatives for improving process efficiency under certain financial limitations. Given the similarity of the automotive manufacturing processes among the various companies, the findings for this particular facility remain valid for other facilities. Originality/value – Investment cost and process improvement are currently the two biggest challenges facing operations managers in the manufacturing industry. This study allows managers to gain a broader perspective on discrete simulation ability to simulate complicated systems and present different process improvement alternatives.

APA, Harvard, Vancouver, ISO, and other styles

48

Aksyonov, Konstantin A., Eugene A. Bykov, Elena F. Smoliy, Olga P. Aksyonova, and Wang Kai. "Planning and Bottleneck analysis of Construction Enterprise Project Portfolio." IFAC Proceedings Volumes 46, no. 9 (2013): 659–63. http://dx.doi.org/10.3182/20130619-3-ru-3018.00240.

Full text

APA, Harvard, Vancouver, ISO, and other styles

49

Yue, X. D., L. B. Cao, D. Q. Miao, Y. F. Chen, and B. Xu. "Multi-view attribute reduction model for traffic bottleneck analysis." Knowledge-Based Systems 86 (September 2015): 1–10. http://dx.doi.org/10.1016/j.knosys.2015.03.022.

Full text

APA, Harvard, Vancouver, ISO, and other styles

50

Mishra, P., A. S. Ali, R. A. K. Aggarwal, S. P. Dixit, V. S. Kawitkar, P. S. Dangi, and N. K. Verma. "Genetic diversity and bottleneck analysis of Konkan Kanyal goats." Animal Genetic Resources/Ressources génétiques animales/Recursos genéticos animales 50 (June 2012): 43–48. http://dx.doi.org/10.1017/s2078633612000082.

Full text

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!