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Optimizing Disruption Recovery Operations for Wind Farms considering Power Generation Loss and Repair Time Uncertainty

Dongmei Zhang, Jiangang Jin, Qingchang Ji, Xintong Zhang
2020 Mathematical Problems in Engineering  
quite different from that of traditional vehicle routing problems; and (3) the working time limit violation for maintenance teams due to uncertain repair time can be effectively avoided.  ...  A case study based on a real wind farm demonstrates (1) the proposed model is applicable for solving real-world-sized problems; (2) the optimal maintenance route often shows a crossing pattern, which is  ...  time, while traditional vehicle routing problems focus more on minimizing travel time and the service time at each customer is relatively minor as compared to travel time.  ... 
doi:10.1155/2020/8328263 fatcat:mvj6n2b7irf73f4ii3xy4e2cpu

Multi-Objective Optimization of Home Healthcare with Working-Time Balancing and Care Continuity

Amir M. Fathollahi-Fard, Abbas Ahmadi, Behrooz Karimi
2021 Sustainability  
in addition to service and travel times as well as the regulations of companies to meet the standards of high-quality home care services.  ...  The care of elderly persons and general hygienic care at patients' homes are two main reasons to motivate an optimization problem, namely, home healthcare (HHC).  ...  All data are mentioned in the text. Conflicts of Interest: The authors declare no conflict of interest.  ... 
doi:10.3390/su132212431 fatcat:g2gktloxqvc4dgjxk5bfvsuiqm

A concise guide to existing and emerging vehicle routing problem variants [article]

Thibaut Vidal, Gilbert Laporte, Piotr Matl
2020 arXiv   pre-print
The diversity of applications has motivated the study of a myriad of problem variants with different attributes.  ...  Vehicle routing problems have been the focus of extensive research over the past sixty years, driven by their economic importance and their theoretical interest.  ...  Acknowledgments -26/203.310/2016] in Brazil. This support is gratefully acknowledged. Thanks are also due to the referees for their valuable comments.  ... 
arXiv:1906.06750v2 fatcat:hlz5f3uv3fcptbhpljzyj6b6bm

A bi-objective home healthcare routing and scheduling problem considering patients' satisfaction in a fuzzy environment

Amir Mohammad Fathollahi-Fard, Abbas Ahmadi, Fariba Goodarzian, Naoufel Cheikhrouhou
2020 Applied Soft Computing  
With regards to a group of uncertain parameters such as the time of travel and services as well as patients' satisfaction, a fuzzy approach named as the Jimenez's method, is also utilized.  ...  To find a valid plan for these services, an optimization problem called the home healthcare routing and scheduling problem is motivated to perform the logistics of the home care services.  ...  The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.  ... 
doi:10.1016/j.asoc.2020.106385 pmid:32395097 pmcid:PMC7205736 fatcat:53vq4sztgja4rhdmjt6aus6wqe

Sustainable and Robust Home Healthcare Logistics: A Response to the COVID-19 Pandemic

Amir M. Fathollahi-Fard, Abbas Ahmadi, Behrooz Karimi
2022 Symmetry  
In this study, we focus on home healthcare logistics and services for planning the routing and scheduling of caregivers to visit patients' homes.  ...  some managerial insights for achieving sustainable and robust home healthcare services in practice.  ...  Institutional Review Board Statement: Not applicable. Informed Consent Statement: Not applicable. Data Availability Statement: This study did not report any data.  ... 
doi:10.3390/sym14020193 fatcat:wz6mmkarkfgyvk33ypxawldwdu


Mehmet Erdem
2020 South African Journal of Industrial Engineering  
Demographic changes have led to an increase in the demand for home healthcare services and the transporting of healthcare staff.  ...  This paper is an attempt to introduce and address the multi-period electric home healthcare routeing and scheduling problem with nonlinear charging (E-HHCRSP-NL) to handle decisions such as allocating  ...  Related work The HHCRSP is an extension of two well-known NP-hard problems; the vehicle routeing problem with time windows (VRPTW), and the nurse rostering problem (NRP).  ... 
doi:10.7166/31-2-2153 fatcat:5a7zy4cwarcz7jkmvsbmdk4koe

Consolidation and coordination of routes in urban distribution

Andrea Mor
2019 4OR  
Dominique Feillet, who co-authored two fo the works presented in this thesis and hosted me in the Ecole de Mines the Saint-Etienne, and Prof. Harilaos N.  ...  Viegas for sharing his experience on real world problems.  ...  Acknowledgements I owe my gratitude, and perhaps more, to many people, but I am not very good at being thankful on paper, so I will be brief.  ... 
doi:10.1007/s10288-019-00400-6 fatcat:dq5uwagfuje5dhqyqlksm4hb54

Drone-assisted deliveries: new formulations for the flying sidekick traveling salesman problem

Mauro Dell'Amico, Roberto Montemanni, Stefano Novellani
2019 Optimization Letters  
In particular we consider the Flying Sidekick Traveling Salesman Problem, where a truck and a drone cooperate to delivery parcels to customers minimizing the completion time.  ...  In this paper we consider a problem related to deliveries assisted by an unmanned aerial vehicle, so-called drone.  ...  , among the categories defined by Drexl [30] , the FSTSP can be considered under movement synchronization en route, where vehicles may join and separate multiple times along a route.  ... 
doi:10.1007/s11590-019-01492-z fatcat:dpluzyd54zbchki4ckhqobulnm

Home healthcare routing and scheduling of multiple nurses in a dynamic environment

Mustafa Demirbilek, Juergen Branke, Arne K. Strauss
2019 Flexible Services and Manufacturing Journal  
significantly higher average daily visits and shorter travel times compared to the greedy method.  ...  If so, which nurse services the patient? Finally, which days and times are weekly visits of the patient assigned to?  ...  We require that patients are serviced at the same days and times during their service horizon, which is called consistent, periodic Vehicle Routing Problem (VRP).  ... 
doi:10.1007/s10696-019-09350-x fatcat:4c2zl76eabch7gihdbt46xcdp4

Operations Research (OR) in Service Industries: A Comprehensive Review

Yiting Xing, Ling Li, Zhuming Bi, Marzena Wilamowska-Korsak, Li Zhang
2013 Systems research and behavioral science  
in service industries in comparison with those in manufacturing industries, and the limitations of existing methodologies and tools have been discussed.  ...  To clarify future research directions of operations research (OR) in the service industry, the state of art of OR has been examined systematically, the new requirements of OR are identified for its applications  ...  Caramia and Guerriero (2009) depicted a long-haul freight transportation problem into a multi-objective vehicle routing model where the travel time and route cost were minimized and the transportation  ... 
doi:10.1002/sres.2185 fatcat:bmil4ahow5cmzesh64bjm6fd5y

Dynamic Vehicle Routing Problem for Medical Emergency Management [chapter]

Jean-Charles Creput, Amir Hajjam, Abderrafiaa Koukam, Olivier Kuh
2011 Self Organizing Maps - Applications and Novel Algorithm Design  
vehicle routes in real-time.  ...  In the standard VRP, a fleet of vehicles must be routed to visit a set of customers at minimum cost, subject to vehicle capacity constraint and route duration constraint.  ...  By representing medical emergency services by a Dynamic Vehicle Routing Problem with Time Windows, we are able to optimize human and material resources and so reduce costs, reaction time and maybe save  ... 
doi:10.5772/14346 fatcat:6ge23qy3t5ekfexdphfupa2uyu

Integrated Transportation - Inventory Models: A Review

Alyssa Mosca, Navneet Vidyarthi, Ahmet Satir
2019 Operations Research Perspectives  
Terms of use: Documents in EconStor may be saved and copied for your personal and scholarly purposes.  ...  If the documents have been made available under an Open Content Licence (especially Creative Commons Licences), you may exercise further usage rights as specified in the indicated licence.  ...  A more encompassing stochastic routing problem, with consideration for production, inventory and transportation, was presented by Jha and Shanker [61] .  ... 
doi:10.1016/j.orp.2019.100101 fatcat:joemakgwlrearoklu53jedbovi

Planning and control of autonomous mobile robots for intralogistics: Literature review and research agenda

Giuseppe Fragapane, René de Koster, Fabio Sgarbossa, Jan Ola Strandhagen
2021 European Journal of Operational Research  
Compared to an automated guided vehicle (AGV) system in which a central unit takes control of scheduling, routing, and dispatching decisions for all AGVs, AMRs can communicate and negotiate independently  ...  with other resources like machines and systems and thus decentralize the decision-making process.  ...  Acknowledgments This research received funding from the strategic research area of NTNU Health in 2020 at NTNU, the Norwegian University of Science and Technology.  ... 
doi:10.1016/j.ejor.2021.01.019 fatcat:35kw4ivhz5ed7m4keotmecj56a


Guliko Kiliptari
2019 Black Sea scientific journal of academic research  
The case reflects the important problem after myocardial infarction , ventricular septal rupture and challenges the timing of intervention Patient 70 year old,male,caucasion was admitted in our hospital  ...  with encephalopathy and hypotension.ECG revealed ST segment elevation in II,III,AVF,V4-V6 lead,ST segment depression in AVL,V1-V3 lead.  ...  complex tasks such as the problem of a sales agent [14] , the problem of vehicle routing (VRP) [15] , and the best route search [16] .  ... 
doi:10.36962/gbssjar17 fatcat:2ercpkiyzvbdbnwswrzqwnypzu

A Multiperiod Workforce Scheduling and Routing Problem with Dependent Tasks

Dilson Lucas Pereiraa, Júlio César Alves, Mayron César de Oliveira Moreira
2020 Computers & Operations Research  
In this paper, we study a new Workforce Scheduling and Routing Problem, denoted Multiperiod Workforce Scheduling and Routing Problem with Dependent Tasks.  ...  The objective is to schedule and route teams so that the makespan is minimized, i.e., all services are completed in the minimum number of days.  ...  [29] consider a multiperiod, multidepot uncapacitated vehicle routing problem with specific constraints, called the Multiperiod Field Service Routing Problem (MPFSRP).  ... 
doi:10.1016/j.cor.2020.104930 fatcat:4ikzoipsyvainjbjvfsrismidu
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