Fakultet for ingeniørvitenskap og teknologihttps://hdl.handle.net/10037/83442024-03-19T03:50:21Z2024-03-19T03:50:21ZAnalysis of civil engineering infrastructure in Norway with solutions based on structural health monitoring and artificial intelligenceTangrand, Kristoffer MeyerSingh, Harpalhttps://hdl.handle.net/10037/331782024-03-18T17:35:13Z2023-05-19T00:00:00ZTangrand, Kristoffer Meyer; Singh, Harpal<br />
Ageing civil infrastructures such as bridges and building causes many consequences from practical and economical point of view. Especially in northern Norway, the impact of extreme arctic conditions is intense on civil engineering infrastructures (see \cite{Singh:2022:hologaland_Bridge}). With the increased loading due to the prosperous seafood industry and increased cargo activity is putting additional pressure on the aged infrastructures. Research and development of new methods is needed for the damage detection in these structures. In this paper we present, discuss and analyze the situation concerning bridges in Norway with a special focus on northern Norway. Moreover, based on the research in \cite{singh:2022:phdThesis}, \cite{singh:2019OMA-Application} and \cite{singh:2021:comprehensive} we describe and emphasise the importance of structural health monitoring methods, artificial intelligence and machine learning when trying to solve these serious problems of structural damage detection especially in arctic regions. The related mathematical tools, in particular the role of equation of motion, are discussed. In a certain specific case of the equation of motion there is discussed the case where the solution may be obtained in the explicit form via the use of the so-called Calder\'on operator.<br />
Source at <a href=http://nonlinearstudies.com/index.php/mesa/article/view/3245>http://nonlinearstudies.com/index.php/mesa/article/view/3245</a>.<br />
2023-05-19T00:00:00ZAnalysis of civil engineering infrastructure in Norway with solutions based on structural health monitoring and artificial intelligenceTangrand, Kristoffer MeyerSingh, HarpalAgeing civil infrastructures such as bridges and building causes many consequences from practical and economical point of view. Especially in northern Norway, the impact of extreme arctic conditions is intense on civil engineering infrastructures (see \cite{Singh:2022:hologaland_Bridge}). With the increased loading due to the prosperous seafood industry and increased cargo activity is putting additional pressure on the aged infrastructures. Research and development of new methods is needed for the damage detection in these structures. In this paper we present, discuss and analyze the situation concerning bridges in Norway with a special focus on northern Norway. Moreover, based on the research in \cite{singh:2022:phdThesis}, \cite{singh:2019OMA-Application} and \cite{singh:2021:comprehensive} we describe and emphasise the importance of structural health monitoring methods, artificial intelligence and machine learning when trying to solve these serious problems of structural damage detection especially in arctic regions. The related mathematical tools, in particular the role of equation of motion, are discussed. In a certain specific case of the equation of motion there is discussed the case where the solution may be obtained in the explicit form via the use of the so-called Calder\'on operator.Mathematics in Engineering, Science and AerospaceJournal articleTidsskriftartikkelPeer reviewedTangrand, Singh. Analysis of civil engineering infrastructure in Norway with solutions based on structural health monitoring and artificial intelligence. Mathematics in Engineering, Science and Aerospace (MESA). 2023;14(2):613-631Mathematics in Engineering, Science and Aerospace (MESA)Academic and research collaboration between the IVT departmentsKhawaja, Hassan Abbashttps://hdl.handle.net/10037/331762024-03-15T10:19:57Z2024-01-01T00:00:00ZKhawaja, Hassan Abbas<br />
UiT Faculty of Engineering Science and Technology (IVT) R&D Seminar, 7 March 2024<br />
2024-01-01T00:00:00ZAcademic and research collaboration between the IVT departmentsKhawaja, Hassan AbbasConference objectKonferansebidragA Digital Reverse Logistics Twin for Improving Sustainability in Industry 5.0Sun, XuYu, HaoSolvang, Wei Denghttps://hdl.handle.net/10037/331642024-03-14T12:19:52Z2023-09-14T00:00:00ZSun, Xu; Yu, Hao; Solvang, Wei Deng<br />
The rapid development of information and communication technology (ICT) and digitalization in the Industry 5.0 era have opened up new opportunities for reverse logistics management to become digitalized, smarter, more sustainable, and simplified by incorporating disruptive technologies, e.g., Internet-of-things (IoT), artificial intelligence (AI), big data analysis, simulation, blockchain, etc. Digital twin is one of the most promising concepts in Industry 5.0, which can re-create a physical object or system in the digital world. In this paper, different from the widely practiced product-based definitions, we extend this concept to a system-oriented digital reverse logistics twin. Based on a conceptual framework allowing for a high level of system integration, we present the key enabling elements for a digital reverse logistics twin that can support decisions in a complex and uncertain environment. Through an illustrative example of a remanufacturing network design problem in Norway, the initial proof-of-concept illustrates how different systems and models can be combined in a digital reverse logistics twin in order to support different decisions.<br />
2023-09-14T00:00:00ZA Digital Reverse Logistics Twin for Improving Sustainability in Industry 5.0Sun, XuYu, HaoSolvang, Wei DengThe rapid development of information and communication technology (ICT) and digitalization in the Industry 5.0 era have opened up new opportunities for reverse logistics management to become digitalized, smarter, more sustainable, and simplified by incorporating disruptive technologies, e.g., Internet-of-things (IoT), artificial intelligence (AI), big data analysis, simulation, blockchain, etc. Digital twin is one of the most promising concepts in Industry 5.0, which can re-create a physical object or system in the digital world. In this paper, different from the widely practiced product-based definitions, we extend this concept to a system-oriented digital reverse logistics twin. Based on a conceptual framework allowing for a high level of system integration, we present the key enabling elements for a digital reverse logistics twin that can support decisions in a complex and uncertain environment. Through an illustrative example of a remanufacturing network design problem in Norway, the initial proof-of-concept illustrates how different systems and models can be combined in a digital reverse logistics twin in order to support different decisions.Springer NatureChapterBokkapittelSun X, Yu H, Solvang WDS: A Digital Reverse Logistics Twin for Improving Sustainability in Industry 5.0. In: Alfnes E, Romsdal A, Strandhagen JO, von Cieminski G, Romero. Advances in Production Management Systems. Production Management Systems for Responsible Manufacturing, Service, and Logistics Futures
IFIP WG 5.7 International Conference, APMS 2023, Trondheim, Norway, September 17–21, 2023, Proceedings, Part II, 2023. SpringerA General Framework for Epidemic Logistics ManagementMaharjan, SujanSolvang, Wei DengYu, Haohttps://hdl.handle.net/10037/331632024-03-14T12:19:53Z2023-01-26T00:00:00ZMaharjan, Sujan; Solvang, Wei Deng; Yu, Hao<br />
Human history is full of epidemic outbreaks that occur on a regular basis. The past epidemics have resulted in millions of deaths and economic recessions. With the increasing frequency of human-induced epidemics in recent years, effective and efficient epidemic logistics management has become vital for successfully containing the spread of the disease as well as preventing societal disruption, avoiding catastrophic human loss, and a substantial economic burden. However, there is a lack of a systematic study on this topic, let alone an in-depth understanding of logistics that are related to the epidemic. This paper aims to fill this gap by studying someco-related concepts that are relevant to epidemic logistics, i.e., humanitarian logistics, and emergency logistics. As none of these existing concepts cover the particularities of an epidemic nor they have managed to capture the characteristics of the logistics in the context of epidemics, a new definition of epidemic logistics is proposed. This definition is then followed by an analysis ofthe challenges and needs for effective and efficient management of epidemic logistics. This leads to ourproposal fora general framework that defines all the essential elements of an epidemic logistics system with a high level of sustainability, resilience, and alignment.This framework also provides a baseline that enables systematic management of logistics operations before, during,and after epidemics. Several research directions and suggestions are provided for follow-up studies.<br />
2023-01-26T00:00:00ZA General Framework for Epidemic Logistics ManagementMaharjan, SujanSolvang, Wei DengYu, HaoHuman history is full of epidemic outbreaks that occur on a regular basis. The past epidemics have resulted in millions of deaths and economic recessions. With the increasing frequency of human-induced epidemics in recent years, effective and efficient epidemic logistics management has become vital for successfully containing the spread of the disease as well as preventing societal disruption, avoiding catastrophic human loss, and a substantial economic burden. However, there is a lack of a systematic study on this topic, let alone an in-depth understanding of logistics that are related to the epidemic. This paper aims to fill this gap by studying someco-related concepts that are relevant to epidemic logistics, i.e., humanitarian logistics, and emergency logistics. As none of these existing concepts cover the particularities of an epidemic nor they have managed to capture the characteristics of the logistics in the context of epidemics, a new definition of epidemic logistics is proposed. This definition is then followed by an analysis ofthe challenges and needs for effective and efficient management of epidemic logistics. This leads to ourproposal fora general framework that defines all the essential elements of an epidemic logistics system with a high level of sustainability, resilience, and alignment.This framework also provides a baseline that enables systematic management of logistics operations before, during,and after epidemics. Several research directions and suggestions are provided for follow-up studies.Springer NatureChapterBokkapittelMaharjan S, Solvang WDS, Yu H: A General Framework for Epidemic Logistics Management. In: Wang Y, Yu T, Wang K. Advanced Manufacturing and Automation XII. Conference proceedings IWAMA 2022., 2023. Springer p. 245-256Experimental Investigation of Deicing with SeawaterSæterdal, Ane SolbakkenVisich, AleksandraDeshpande, SujaySundsbø, Per-Arnehttps://hdl.handle.net/10037/331622024-03-14T12:19:52Z2023-06-19T00:00:00ZSæterdal, Ane Solbakken; Visich, Aleksandra; Deshpande, Sujay; Sundsbø, Per-Arne<br />
Increased traffic and interest in arctic regions necessitate measures to ensure the safety and functionality of vessels. Sea-spray icing is one of the significant hazards for small- and medium-sized vessels in polar waters. Ice cover can restrict access to essential parts of a vessel and compromise its stability. Existing deicing measures, such as heat or chemical application and manual ice removal, prove impractical in many cases. Seawater, being abundant and easily accessible during marine operations, has a good potential as a deicing agent, as shown by wave-washing. The present study assesses seawater deicing through a full-scale experiment on a lifeboat docked in a harbor in Northern Norway, with ambient air and seawater temperatures of −8 °C and 3 °C, respectively. A 10-20 mm thick ice layer was created on the boat prior to the experiment. Deicing was performed using the fire protection system on the boat, capable of spraying water on the surface, fed by the ambient seawater and driven by the boat engine. After the 32-minutes experiment a significant part of the ice was melted or washed away, thereby restoring functionality and access to the windows, hatches, lifting hooks and railings. The method was more efficient on the vertical surfaces than on the horizontal ones. Some improvements in the sprinkler system layout and design may enhance the performance of the method.<br />
Source at <a href=https://onepetro.org/ISOPEIOPEC/proceedings/ISOPE23/All-ISOPE23/ISOPE-I-23-291/524613?searchresult=1>https://onepetro.org/ISOPEIOPEC/proceedings/ISOPE23/All-ISOPE23/ISOPE-I-23-291/524613?searchresult=1</a>.<br />
2023-06-19T00:00:00ZExperimental Investigation of Deicing with SeawaterSæterdal, Ane SolbakkenVisich, AleksandraDeshpande, SujaySundsbø, Per-ArneIncreased traffic and interest in arctic regions necessitate measures to ensure the safety and functionality of vessels. Sea-spray icing is one of the significant hazards for small- and medium-sized vessels in polar waters. Ice cover can restrict access to essential parts of a vessel and compromise its stability. Existing deicing measures, such as heat or chemical application and manual ice removal, prove impractical in many cases. Seawater, being abundant and easily accessible during marine operations, has a good potential as a deicing agent, as shown by wave-washing. The present study assesses seawater deicing through a full-scale experiment on a lifeboat docked in a harbor in Northern Norway, with ambient air and seawater temperatures of −8 °C and 3 °C, respectively. A 10-20 mm thick ice layer was created on the boat prior to the experiment. Deicing was performed using the fire protection system on the boat, capable of spraying water on the surface, fed by the ambient seawater and driven by the boat engine. After the 32-minutes experiment a significant part of the ice was melted or washed away, thereby restoring functionality and access to the windows, hatches, lifting hooks and railings. The method was more efficient on the vertical surfaces than on the horizontal ones. Some improvements in the sprinkler system layout and design may enhance the performance of the method.ISOPEChapterBokkapittelSæterdal, Visich, Deshpande, Sundsbø: Experimental Investigation of Deicing with Seawater. In: ISOPE 2023. Proceedings of the Thirty-third (2023) International Ocean and Polar Engineering Conference, Ottawa, Canada, June 19-23, 2023 - ISOPE 2023, 2023. International Society of Offshore & Polar Engineershttps://onepetro.org/search-results?page=1&q=Experimental%20Investigation%20of%20Deicing%20with%20SeawaterNon-directional Overcurrent Protection Relay Testing Using Virtual Hardware-in-the-Loop DevicePham, Le Nam HaiWagle, RajuGonzalez-Longatt, FranciscoAcosta Montalvo, Martha Nohemihttps://hdl.handle.net/10037/331612024-03-14T12:19:50Z2023-05-17T00:00:00ZPham, Le Nam Hai; Wagle, Raju; Gonzalez-Longatt, Francisco; Acosta Montalvo, Martha Nohemi<br />
Protective relays are an integral part of the power grid, making it reliable and secure against abnormal conditions. Hardware-in-the-Loop (HIL) can be employed to test and validate digital protective relay devices in the real-time simulation comprising hardware and software before actual implementation. However, the HIL technique requires a complex and high-cost technical environment consisting of hardware devices, sensors, communication, and simulation platforms. The Virtual HIL (VHIL) Device is a new real-time simulation approach to offer the entire experience and challenges coming from the actual implementation of HIL. It allows the users to approach the possibility of learning the principles and techniques used in HIL without any concern related to using real hardware or physical devices. This chapter aims to illustrate the use of the model-based system engineering toolchains of Typhoon HIL for understanding the implementation methodology of the VHIL technique, from creating a testing model to the process of running. A modified version of the well-known three-phase radial feeder of the European MV distribution benchmark system created by CIGRE Task Force C6.04.02 is modelled and simulated for evaluating non-directional overcurrent protective relay performance through multiple short-circuit fault scenarios. The main contribution of this chapter is to systematically introduce the modelling and simulation for testing purposes of the non-directional overcurrent protection relay in VHIL that helps power engineers evaluate the protective relay settings under more realistic conditions.<br />
2023-05-17T00:00:00ZNon-directional Overcurrent Protection Relay Testing Using Virtual Hardware-in-the-Loop DevicePham, Le Nam HaiWagle, RajuGonzalez-Longatt, FranciscoAcosta Montalvo, Martha NohemiProtective relays are an integral part of the power grid, making it reliable and secure against abnormal conditions. Hardware-in-the-Loop (HIL) can be employed to test and validate digital protective relay devices in the real-time simulation comprising hardware and software before actual implementation. However, the HIL technique requires a complex and high-cost technical environment consisting of hardware devices, sensors, communication, and simulation platforms. The Virtual HIL (VHIL) Device is a new real-time simulation approach to offer the entire experience and challenges coming from the actual implementation of HIL. It allows the users to approach the possibility of learning the principles and techniques used in HIL without any concern related to using real hardware or physical devices. This chapter aims to illustrate the use of the model-based system engineering toolchains of Typhoon HIL for understanding the implementation methodology of the VHIL technique, from creating a testing model to the process of running. A modified version of the well-known three-phase radial feeder of the European MV distribution benchmark system created by CIGRE Task Force C6.04.02 is modelled and simulated for evaluating non-directional overcurrent protective relay performance through multiple short-circuit fault scenarios. The main contribution of this chapter is to systematically introduce the modelling and simulation for testing purposes of the non-directional overcurrent protection relay in VHIL that helps power engineers evaluate the protective relay settings under more realistic conditions.Springer NatureChapterBokkapittelPham LNH, Wagle, Gonzalez-Longatt, Acosta Montalvo: Non-directional Overcurrent Protection Relay Testing Using Virtual Hardware-in-the-Loop Device. In: Tripathi SM, Gonzalez-Longatt FGL. Real-Time Simulation and Hardware-in-the-Loop Testing Using Typhoon HIL, 2023. Springer p. 283-337Measuring the Effectiveness of AI-Enabled Chatbots in Customer Service Using AnyLogic SimulationSun, XuYu, HaoSolvang, Wei Denghttps://hdl.handle.net/10037/331592024-03-14T11:20:28Z2023-01-26T00:00:00ZSun, Xu; Yu, Hao; Solvang, Wei Deng<br />
With the rapid technological advancement and innovation in Industry 4.0/5.0, digitalization has become the mainstream that transforms the paradigm of many industries, businesses, and services. In this regard, AI-enabled chatbots have been increasingly adopted by many companies for providing customer services instead of human agents. On the one hand, the use of AI-enabled chatbots provides opportunities to reduce customers’ waiting time, improve efficiency, and minimize costs. On the other hand, it may, however, negatively affect customers’ experiences due to several reasons, e.g., unfamiliarity with the IT system, incapability to properly answer individualized questions by chatbots, etc. Several qualitative analyses have been done to investigate the benefits and challenges of using AI-enabled chatbots for companies and also to reveal the customers’ perceptions and experiences, but there is still a lack of quantitative research that may help companies to adopt this new technology in their customer service. To fill this gap, in this paper, we develop a discrete event simulation model using the AnyLogic simulation software package to measure the effectiveness of AIenabled chatbots, which, through scenario analyses, provides managerial implications related to the average time in the system, response rate, satisfaction level, and cost savings. Thus, this method can help companies with a better understanding of the impact of adopting AI-enabled chatbots in their customer service.<br />
2023-01-26T00:00:00ZMeasuring the Effectiveness of AI-Enabled Chatbots in Customer Service Using AnyLogic SimulationSun, XuYu, HaoSolvang, Wei DengWith the rapid technological advancement and innovation in Industry 4.0/5.0, digitalization has become the mainstream that transforms the paradigm of many industries, businesses, and services. In this regard, AI-enabled chatbots have been increasingly adopted by many companies for providing customer services instead of human agents. On the one hand, the use of AI-enabled chatbots provides opportunities to reduce customers’ waiting time, improve efficiency, and minimize costs. On the other hand, it may, however, negatively affect customers’ experiences due to several reasons, e.g., unfamiliarity with the IT system, incapability to properly answer individualized questions by chatbots, etc. Several qualitative analyses have been done to investigate the benefits and challenges of using AI-enabled chatbots for companies and also to reveal the customers’ perceptions and experiences, but there is still a lack of quantitative research that may help companies to adopt this new technology in their customer service. To fill this gap, in this paper, we develop a discrete event simulation model using the AnyLogic simulation software package to measure the effectiveness of AIenabled chatbots, which, through scenario analyses, provides managerial implications related to the average time in the system, response rate, satisfaction level, and cost savings. Thus, this method can help companies with a better understanding of the impact of adopting AI-enabled chatbots in their customer service.Springer NatureChapterBokkapittelSun X, Yu H, Solvang WDS: Measuring the Effectiveness of AI-Enabled Chatbots in Customer Service Using AnyLogic Simulation. In: Wang Y, Yu T, Wang K. Advanced Manufacturing and Automation XII. Conference proceedings IWAMA 2022., 2023. Springer p. 266-274A Convergent Numerical Algorithm for α-Dissipative Solutions of the Hunter–Saxton EquationChristiansen, ThomasGrunert, KatrinNordli, Anders SamuelsenSolem, Susannehttps://hdl.handle.net/10037/331462024-03-08T15:20:16Z2024-03-02T00:00:00ZChristiansen, Thomas; Grunert, Katrin; Nordli, Anders Samuelsen; Solem, Susanne<br />
A convergent numerical method for α -dissipative solutions of the Hunter–Saxton equation is derived. The method is based on applying a tailor-made projection operator to the initial data, and then solving exactly using the generalized method of characteristics. The projection step is the only step that introduces any approximation error. It is therefore crucial that its design ensures not only a good approximation of the initial data, but also that errors due to the energy dissipation at later times remain small. Furthermore, it is shown that the main quantity of interest, the wave profile, converges in L<sup>∞</sup> for all t≥0
, while a subsequence of the energy density converges weakly for almost every time.<br />
2024-03-02T00:00:00ZA Convergent Numerical Algorithm for α-Dissipative Solutions of the Hunter–Saxton EquationChristiansen, ThomasGrunert, KatrinNordli, Anders SamuelsenSolem, SusanneA convergent numerical method for α -dissipative solutions of the Hunter–Saxton equation is derived. The method is based on applying a tailor-made projection operator to the initial data, and then solving exactly using the generalized method of characteristics. The projection step is the only step that introduces any approximation error. It is therefore crucial that its design ensures not only a good approximation of the initial data, but also that errors due to the energy dissipation at later times remain small. Furthermore, it is shown that the main quantity of interest, the wave profile, converges in L<sup>∞</sup> for all t≥0
, while a subsequence of the energy density converges weakly for almost every time.Springer NatureJournal articleTidsskriftartikkelPeer reviewedChristiansen T, Grunert K, Nordli AS, Solem S. A Convergent Numerical Algorithm for α-Dissipative Solutions of the Hunter–Saxton Equation. Journal of Scientific Computing. 2024;99(14)Journal of Scientific ComputingNorges forskningsråd: 250070Norges forskningsråd: 286822Take-Home Exams in University Mathematics and Science Subjects: Some Ethical ConsiderationsRensaa, Ragnhild JohanneKristiansen, Raymondhttps://hdl.handle.net/10037/331282024-03-06T10:21:33Z2024-01-01T00:00:00ZRensaa, Ragnhild Johanne; Kristiansen, Raymond<br />
This article addresses some challenging perspectives related to offering take-home exams in mathematics at university level. The challenges arose during work on a previous article where four perspectives originating from Bjerrum Nielsen’s framework (2003) were used to analyze universities’ assessment methods during the Covid lockdown in our country. The perspectives had some ethical considerations that were beyond the scope of the previous work. They include social, ethical but also personal aspect of the students involved. We raise a discussion and conclude that the arguments lead to new questions that need to be followed up. We finalize the article with an argument as to why the discussion is important even in a post Covid situation.<br />
2024-01-01T00:00:00ZTake-Home Exams in University Mathematics and Science Subjects: Some Ethical ConsiderationsRensaa, Ragnhild JohanneKristiansen, RaymondThis article addresses some challenging perspectives related to offering take-home exams in mathematics at university level. The challenges arose during work on a previous article where four perspectives originating from Bjerrum Nielsen’s framework (2003) were used to analyze universities’ assessment methods during the Covid lockdown in our country. The perspectives had some ethical considerations that were beyond the scope of the previous work. They include social, ethical but also personal aspect of the students involved. We raise a discussion and conclude that the arguments lead to new questions that need to be followed up. We finalize the article with an argument as to why the discussion is important even in a post Covid situation.University of ExeterJournal articleTidsskriftartikkelPeer reviewedRensaa RJ, Kristiansen R. Take-Home Exams in University Mathematics and Science Subjects: Some Ethical Considerations. Philosophy of Mathematics Education Journal. 2024(41)Philosophy of Mathematics Education JournalA new dispatching mechanism for parallel-machine scheduling with different efficiencies and sequence-dependent setup timesWu, Gen-HanPourhejazy, PouryaLi, Wang-XianWu, Tai-Hsihttps://hdl.handle.net/10037/330382024-02-26T14:21:34Z2024-02-22T00:00:00ZWu, Gen-Han; Pourhejazy, Pourya; Li, Wang-Xian; Wu, Tai-Hsi<br />
he Apparent Tardiness Cost (ATC) dispatching rule was initially developed to minimize tardiness in single machine scheduling problems. ATC extensions have been frequently applied in other production settings,
relying heavily on blocking idle machine capacity with a single-machine outlook; this approach may not
result in the best outcomes, considering that machines have different efficiencies. This study develops a new
dispatching rule for parallel-machine scheduling, considering different machine efficiencies, ready times, and
sequence-dependent setup times to minimize the total weighted tardiness. The proposed method reduces the
time interference factor of the denominator item in the dispatching rule and uses more effective methods for
selecting the best processing machine for the jobs. The grid approach is used to evaluate the method against
the state-of-the-art. The experimental results confirm that the developed method is superior regardless of the
type of parallel machines, the problem scale, and other operational parameters. It is also shown that other
ATC dispatching rules can be improved by applying the proposed approach. The proposed method could be
incorporated into soft computing techniques for more effective and efficient scheduling.<br />
2024-02-22T00:00:00ZA new dispatching mechanism for parallel-machine scheduling with different efficiencies and sequence-dependent setup timesWu, Gen-HanPourhejazy, PouryaLi, Wang-XianWu, Tai-Hsihe Apparent Tardiness Cost (ATC) dispatching rule was initially developed to minimize tardiness in single machine scheduling problems. ATC extensions have been frequently applied in other production settings,
relying heavily on blocking idle machine capacity with a single-machine outlook; this approach may not
result in the best outcomes, considering that machines have different efficiencies. This study develops a new
dispatching rule for parallel-machine scheduling, considering different machine efficiencies, ready times, and
sequence-dependent setup times to minimize the total weighted tardiness. The proposed method reduces the
time interference factor of the denominator item in the dispatching rule and uses more effective methods for
selecting the best processing machine for the jobs. The grid approach is used to evaluate the method against
the state-of-the-art. The experimental results confirm that the developed method is superior regardless of the
type of parallel machines, the problem scale, and other operational parameters. It is also shown that other
ATC dispatching rules can be improved by applying the proposed approach. The proposed method could be
incorporated into soft computing techniques for more effective and efficient scheduling.ElsevierJournal articleTidsskriftartikkelPeer reviewedWu G, Pourhejazy P, Li, Wu. A new dispatching mechanism for parallel-machine scheduling with different efficiencies and sequence-dependent setup times. Decision Analytics Journal. 2024Decision Analytics Journal