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Condition-based maintenance strategy optimization of meta-action unit considering imperfect preventive maintenance based on Wiener process Flex. Serv. Manuf. J. (IF 2.368) Pub Date : 2021-03-01 Xinlong Li; Yan Ran; Fangming Wan; Hui Yu; Genbao Zhang; Yan He
With the popularization and application of technologies such as monitoring and sensing, the application of condition-based maintenance has become increasingly widespread. However, most traditional condition-based maintenance strategies focus on a component or system, which is too large for fault diagnosis and location. Moreover, imperfect maintenance is seldom considered and most of them only optimize
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Demand modelling for emergency medical service system with multiple casualties cases: k-inflated mixture regression model Flex. Serv. Manuf. J. (IF 2.368) Pub Date : 2021-02-25 Hyunjin Lee, Taesik Lee
In most of the literature on emergency medical service (EMS) system design and analysis, arrivals of EMS calls are assumed to follow Poisson process. However, it is not uncommon for real-world EMS systems to experience batch arrivals of EMS requests, where a single call involves more than one patient. Properly capturing such batch arrivals is needed to enhance the quality of analyses, thereby improving
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Information sharing in decentralised supply chains with partial collaboration Flex. Serv. Manuf. J. (IF 2.368) Pub Date : 2021-02-19 Roberto Dominguez, Salvatore Cannella, Borja Ponte, Jose M. Framinan
We explore the value of information sharing for smoothing the dynamics of supply chains when some echelons do not collaborate. To this end, we study seven information sharing structures in a four-echelon supply chain using a system dynamics approach. We find that the overall propagation of the bullwhip effect in supply chains decreases as the number of echelons sharing information grows, but it is
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Subsidy policies and operational strategies for multiple competing photovoltaic supply chains Flex. Serv. Manuf. J. (IF 2.368) Pub Date : 2021-01-31 Zhisong Chen, Keith C. K. Cheung, Xiangtong Qi
In the past decade, subsidy policies aimed at demand-side of photovoltaic (PV) supply chains have created a dilemma. While they foster the growth of the PV industry, they also induce overcapacity problems to the society. As a result, many governments have cut back subsidies to PV system users. These subsidy reductions hurt PV enterprises and their supply chains that are now facing lost business. To
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To team up or not: single versus team driving in European road freight transport Flex. Serv. Manuf. J. (IF 2.368) Pub Date : 2020-12-30 Asvin Goel, Thibaut Vidal, Adrianus Leendert Kok
The last decades have seen a tremendous amount of research being devoted to effectively managing vehicle fleets and minimizing empty mileage. However, in contrast to, e.g., the air transport sector, the question of how to best assign crews to vehicles, has received very little attention in the road transport sector. The vast majority of road freight transport in Europe is conducted by single drivers
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A heuristic algorithm for identical parallel machine scheduling: splitting jobs, sequence-dependent setup times, and limited setup operators Flex. Serv. Manuf. J. (IF 2.368) Pub Date : 2020-11-28 Jun-Ho Lee, Hyun-Jung Kim
We examine a parallel machine scheduling problem with a job splitting property, sequence-dependent setup times, and limited setup operators, for minimizing makespan. Jobs are split into arbitrary (job) sections that can be processed on different machines simultaneously. When a job starts to be processed on a machine, a setup that requires an operator is performed, and the setup time is sequence-dependent
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Social equity in supplier–buyer relationships in smallholder agri-food supply chains Flex. Serv. Manuf. J. (IF 2.368) Pub Date : 2020-11-13 Nayeli Hernandez-Martinez, Nevin Mutlu, Jan C. Fransoo
We study supplier–buyer relationships in smallholder agri-food supply chains with equity concerns and under stakeholder engagement. We develop a game theoretic model to study the impact of these socially responsible practices in investment and pricing decisions. We model this as a Stackelberg game and study the impacts of the power structure in the outcomes. Our work was motivated by the business model
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Defining accurate delivery dates in make to order job-shops managed by workload control Flex. Serv. Manuf. J. (IF 2.368) Pub Date : 2020-10-23 Davide Mezzogori, Giovanni Romagnoli, Francesco Zammori
Workload control (WLC) is a lean oriented system that reduces queues and waiting times, by imposing a cap to the workload released to the shop floor. Unfortunately, WLC performance does not systematically outperform that of push operating systems, with undersaturated utilizations levels and optimized dispatching rules. To address this issue, many scientific works made use of complex job-release mechanisms
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A data-driven multi-fidelity simulation optimization for medical staff configuration at an emergency department in Hong Kong Flex. Serv. Manuf. J. (IF 2.368) Pub Date : 2020-10-01 Hainan Guo, Haobin Gu, Yu Zhou, Jiaxuan Peng
Overcrowding at emergency departments in Hong Kong has been a critical issue for hospital managers recently. In this study, we focus on optimizing the medical staff configuration to alleviate overcrowding. According to the service requirements proposed by the Hong Kong government, 90% of urgent patients should receive treatment within 30 min. However, this condition is rarely satisfied in the practical
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Revenue management with two fare classes in synchromodal container transportation Flex. Serv. Manuf. J. (IF 2.368) Pub Date : 2020-09-25 Bart Van Riessen, Judith Mulder, Rudy R. Negenborn, Rommert Dekker
The cargo fare class mix (CFCM) problem aims to find the optimal fare class mix for a given intermodal transportation network based on known client demands. It is based on a revenue management problem for aviation passengers, the fare class mix problem, but considering intermodal cargo transportation, two major differences apply. Firstly, the CFCM’s premise is that long-term commitments to customers
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Simulation optimization iteration approach on traffic integrated yard allocation problem in transshipment terminals Flex. Serv. Manuf. J. (IF 2.368) Pub Date : 2020-09-05 Chenhao Zhou, Qitong Zhao, Haobin Li
To improve the efficiency of the container terminals, we propose a simulation optimization iteration approach to integrate the yard allocation problem (YAP) with the vehicle congestion problem. YAP is formulated as a mixed integer programming model to reduce the total job travel time. A discrete event simulation model is developed to simulate the terminal operation and traffic movement within the terminal
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Order review and release in make-to-order flow shops: analysis and design of new methods Flex. Serv. Manuf. J. (IF 2.368) Pub Date : 2020-07-19 Kaustav Kundu, Martin J. Land, Alberto Portioli-Staudacher, Jos A. C. Bokhorst
Increased customization has strengthened the importance of make-to-order companies. The advent of lean management and the introduction of smart and flexible technologies has enabled many of these companies to create flow shop routings. Order review and release (ORR) research, which originally focused on job shops, has started paying attention to flow shops. However, the results have not provided clarity
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Optimizing construction schedules and material deliveries in city logistics: a case study from the building industry Flex. Serv. Manuf. J. (IF 2.368) Pub Date : 2020-06-19 Pamela C. Nolz
We consider the problem of designing a logistics system to assure efficient urban construction processes for an innovative urban building area in the city of Vienna. We address the challenges of coordinating workers and the timely delivery and storage of material with the objective of optimizing resource-efficiency as well as reducing traffic related to construction tasks. The problem is formulated
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Improving emergency department performance by revising the patient–physician assignment process Flex. Serv. Manuf. J. (IF 2.368) Pub Date : 2020-06-16 Lien Vanbrabant, Kris Braekers, Katrien Ramaekers
Emergency departments (EDs) are continuously exploring opportunities to improve their efficiency. A new opportunity lies in revising the patient–physician assignment process by limiting the number of patients simultaneously assigned to a single physician, which is defined as the application of a case manager approach with limited caseloads. The potential of introducing a case manager approach with
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Incorporating shifting bottleneck identification in assembly line balancing problem using an artificial immune system approach Flex. Serv. Manuf. J. (IF 2.368) Pub Date : 2020-06-14 Mohd Nor Akmal Khalid, Umi Kalsom Yusof
The manufacturing industry has evolved in the past few years due to the competitive global economy where the performance of its assembly line operations is primarily dependent upon optimum resource utilization. The assembly line operations are balanced among the available resources to obtain an equal amount of workload to achieve optimum resource utilization, called the assembly line balancing (ALB)
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Modeling the effect of imperfect staggering in product inflow using queuing theory: revisiting block stacking layout Flex. Serv. Manuf. J. (IF 2.368) Pub Date : 2020-06-11 Rakesh Venkitasubramony, Gajendra K. Adil
Conventional approaches to layout design of block stacked warehouses assume perfect staggering of product inflow leading to perfect sharing of space among products. Since such an assumption is seldom true, we argue that warehouses designed using the conventional approach may result in choking situations with large quantities of inventory waiting outside the storage areas. On the other hand, liberal
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Planning hinterland container transportation in congested deep-sea terminals Flex. Serv. Manuf. J. (IF 2.368) Pub Date : 2020-06-04 Bernard G. Zweers, Sandjai Bhulai, Rob D. van der Mei
The size of container ships and the number of containers being transshipped at container terminals have steadily increased over the years. Consequently, it is important to make efficient use of the hinterland capacity. A concept that is used to do this is synchromodal transportation, in which at the very last moment the mode of transportation for a container is decided. Unfortunately, some deep-sea
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Scheduling and loading problem for multiple, identical dry kilns Flex. Serv. Manuf. J. (IF 2.368) Pub Date : 2020-05-30 Maria Anna Huka, Christian Rindler, Manfred Gronalt
The drying of sawn lumber is one of the major processing steps in sawmills with high production volumes. Existing publications on kiln drying analyse and improve technological conditions, while this paper focuses on the scheduling and loading planning with time availability of the individual dried packages. To improve dry kiln scheduling for multiple and identical kilns in large softwood processing
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A comprehensive review of quay crane scheduling, yard operations and integrations thereof in container terminals Flex. Serv. Manuf. J. (IF 2.368) Pub Date : 2020-05-16 Damla Kizilay, Deniz Türsel Eliiyi
Over the past decades, container transportation has achieved considerable growth, and maritime trade now constitutes 80% of the global trade. The vessel sizes increased in parallel, up to 21,400 TEU (Twenty-foot-equivalent unit container). Accordingly, global containerized trade reached up to 150 million TEU in 2017 (UNCTAD 2018). This growth brings the need to use scientific methods to manage and
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Supply chain information sharing under consideration of bullwhip effect and system robustness Flex. Serv. Manuf. J. (IF 2.368) Pub Date : 2020-05-12 Lina Tang, Taho Yang, Yiliu Tu, Yizhong Ma
Supply chain system experiences variance amplification in order replenishment and inventory level, leading to severe inefficiencies of the system. Information distortion is universally known as a fundamental reason for the variance amplification phenomenon. The purpose of this paper is to study the effect of demand information sharing in reducing bullwhip effect and improving the robustness of supply
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Pricing strategies for competitive firms with indirect network effects Flex. Serv. Manuf. J. (IF 2.368) Pub Date : 2020-05-07 Wenzhu Zhang, Yue Dai, Lin Tian
In this paper, we analyze the impact of indirect network effects and competition on two firms each offering two complementary products. We first formulate the pricing game with general network effects and show that it is neither a supermodular nor a submodular game. We then derive the closed-form Nash equilibrium with linear demand functions. Furthermore, we examine a model with two symmetric firms
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Robust facility location with structural complexity and demand uncertainty Flex. Serv. Manuf. J. (IF 2.368) Pub Date : 2020-04-04 Yun Hui Lin, Yuan Wang, Loo Hay Lee, Ek Peng Chew
Building robust logistics networks against facility disruptions has been gaining more attention from both researchers and practitioners. However, in pursuit of high built-in network robustness, one usually has to increase the network redundancy and complexity, which adds to the difficulty of management and induces additional operating costs. In this paper, we aim to balance the trade-off between robustness
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Demand smoothing in shift design Flex. Serv. Manuf. J. (IF 2.368) Pub Date : 2020-03-21 Pieter Smet, Annelies Lejon, Greet Vanden Berghe
Shift design is an essential step in workforce planning in which staffing requirements must be obtained for a set of shifts which best cover forecasted demand given as a demand pattern. Existing models for this challenging optimization problem perform well when these demand patterns fluctuate around an average without any strong variability in demand. However, when demand is irregular, these models
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Optimizing stock levels for service-differentiated demand classes with inventory rationing and demand lead times Flex. Serv. Manuf. J. (IF 2.368) Pub Date : 2020-03-19 Oguzhan Vicil
In this paper, we study a service parts inventory management system for a single product at a parts distribution center serving two priority-demand classes: critical and non-critical. Distribution center keeps a common inventory pool to serve the two demand classes, and provides differentiated levels of service by means of inventory rationing. We assume a continuous review one-for-one ordering policy
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Production-quality policy for a make-from-stock remanufacturing system Flex. Serv. Manuf. J. (IF 2.368) Pub Date : 2020-03-06 Cheng-Han Wu
Remanufacturing capacities are constrained by the collected amount of end-of-life (EOL) products resulting in the make-from-stock model for remanufacturing industries. Remanufacturers may select quality choices in a strategic manner to improve their remanufacturing capacities. Thus, we examine a Cournot duopoly in which an original equipment manufacturer (OEM) sells new products and an independent
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An integrated imperfect production system with advertisement dependent demand using branch and bound technique Flex. Serv. Manuf. J. (IF 2.368) Pub Date : 2020-03-05 Barun Khara, Jayanta Kumar Dey, Shyamal Kumar Mondal
This paper develops an integrated imperfect production-inventory system consisting of a retailer and a manufacturer who produces breakable items. As breakable items are very sensitive to transport, in this paper, to stimulate the retailer, the manufacturer offers (1) free transportation subject to the condition that the retailer must have to order a minimum replenishment quantity specified by the manufacturer
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Consignment supply chain cooperation for complementary products under online to offline business mode Flex. Serv. Manuf. J. (IF 2.368) Pub Date : 2020-02-10 Zhisong Chen, Shong-Iee Ivan Su
The purpose of this paper is to explore the cooperation issues in a consignment supply chain with complementary products under Online to Offline Business Mode (O2O mode). The centralized, decentralized and cooperative game-theoretic decision models are developed, analyzed and compared for a generic consignment supply chain with complementary products under O2O mode. Similar models are also developed
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Safety stock placement for serial systems under supply process uncertainty Flex. Serv. Manuf. J. (IF 2.368) Pub Date : 2020-01-01 Bengisu Urlu; Nesim K. Erkip
In this study, we address safety stock positioning when demand per period is a known constant but supply is uncertain. The supply is either available or not available, while the setting is that of a periodically reviewed, serial system following a base stock policy. Each stage is allowed to operate according to the guaranteed or stochastic service model. We use a Discrete Time Markov Chain model for
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An adaptive priority policy for radiotherapy scheduling Flex. Serv. Manuf. J. (IF 2.368) Pub Date : 2019-11-04 Siqiao Li; Ger Koole; Xiaolan Xie
In radiotherapy, treatment needs to be delivered in time. Long waiting times can result in patient anxiety and growth of tumors. They are often caused by inefficient use of radiotherapy equipment, the linear accelerators (LINACs). However, making an efficient schedule is very challenging, especially when we have multiple types of patients, having different service requirements and waiting time constraints
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A real-time reactive framework for the surgical case sequencing problem Flex. Serv. Manuf. J. (IF 2.368) Pub Date : 2019-10-26 Belinda Spratt; Erhan Kozan
In this paper, we address the multiple operating room (OR) surgical case sequencing problem (SCSP). The objective is to maximise total OR utilisation during standard opening hours. This work uses a case study of a large Australian public hospital with long surgical waiting lists and high levels of non-elective demand. Due to the complexity of the SCSP and the size of the instances considered herein
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Switching- and hedging- point policy for preventive maintenance with degrading machines: application to a two-machine line Flex. Serv. Manuf. J. (IF 2.368) Pub Date : 2019-10-12 Maria Chiara Magnanini; Tullio Tolio
Maintenance and production are frequently managed as separate activities although they do interact. Disruptive events such as machine failures may find the company unready to repair the machine immediately leading to time waste. Preventive Maintenance may be carried out and maintenance time reduced to the effective task duration, in order to prevent time waste. Companies and researchers have been focusing
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Evaluating exposure of a retail rack layout in 3D Flex. Serv. Manuf. J. (IF 2.368) Pub Date : 2019-10-11 Bradley Guthrie; Pratik J. Parikh
Analyzing a retail layout accounting for how a shopper visually interacts with racks along their shopping path can help the retailer identify hot-warm-cold spots and better allocate products to racks in order to maximize revenue. We focus on estimating exposure (which locations are likely to be seen) and the intensity of exposure (how long are they seen) by accounting for the dynamic interaction between
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Markov model and meta-heuristics combined method for cost-effectiveness analysis Flex. Serv. Manuf. J. (IF 2.368) Pub Date : 2019-09-30 Xiuxian Wang; Na Geng; Jianxin Qiu; Zhibin Jiang; Liping Zhou
Cost-effectiveness analysis is an important topic in public health, which can provide valuable information for medical decisions. Several modeling methods are available for conducting cost-effectiveness analysis. However, it is difficult when the data is incomplete. To solve this problem, a Markov model is proposed to model patients’ health states transition, and two hybrid metaheuristics are proposed
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Vessel scheduling in liner shipping: a critical literature review and future research needs Flex. Serv. Manuf. J. (IF 2.368) Pub Date : 2019-09-27 Maxim A. Dulebenets; Junayed Pasha; Olumide F. Abioye; Masoud Kavoosi
Liner shipping plays a major role for freight transportation and international seaborne trade. The economic development of different countries is significantly dependent on the movement of a containerized cargo. One of the most challenging decision problems, tackled by liner shipping companies, is the design of vessel schedules. At the vessel scheduling stage, the liner shipping company aims to determine
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Annual scheduling for anesthesiology medicine residents in task-related programs with a focus on continuity of care Flex. Serv. Manuf. J. (IF 2.368) Pub Date : 2019-07-12 Sebastian Kraul
This article presents a new model for constructing annual schedules for medical residents based on the regulations of a German teaching hospital as well as the program restrictions of the German Medical Association. Since resident programs of physicians do not only vary between disciplines but also between countries, it is essential to evaluate the main characteristics of the program. The main difference
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Efficient procedures for the weighted squared tardiness permutation flowshop scheduling problem Flex. Serv. Manuf. J. (IF 2.368) Pub Date : 2019-07-02 Maria Raquel C. Costa; Jorge M. S. Valente; Jeffrey E. Schaller
This paper addresses a permutation flowshop scheduling problem, with the objective of minimizing total weighted squared tardiness. The focus is on providing efficient procedures that can quickly solve medium or even large instances. Within this context, we first present multiple dispatching heuristics. These include general rules suited to various due date-related environments, heuristics developed
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Optimizing real-world factory flows using aggregated discrete event simulation modelling Flex. Serv. Manuf. J. (IF 2.368) Pub Date : 2019-07-01 Simon Lidberg, Tehseen Aslam, Leif Pehrsson, Amos H. C. Ng
Reacting quickly to changing market demands and new variants by improving and adapting industrial systems is an important business advantage. Changes to systems are costly; especially when those systems are already in place. Resources invested should be targeted so that the results of the improvements are maximized. One method allowing this is the combination of discrete event simulation, aggregated
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Integrated preventive maintenance and flow shop scheduling under uncertainty Flex. Serv. Manuf. J. (IF 2.368) Pub Date : 2019-06-01 Javad Seif, Mohammad Dehghanimohammadabadi, Andrew Junfang Yu
This paper is concerned with stochastic scheduling of production and maintenance activities in a permutation flow shop setting. We present a two-stage stochastic mixed-integer program (SMIP) that adapts the conventional permutation flow shop scheduling problem for incorporating multiple preventive maintenance activities with various meter-based intervals. The model handles uncertainties in both processing
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Evolving ant colony system for large-sized integrated process planning and scheduling problem considering sequence-dependent setup times Flex. Serv. Manuf. J. (IF 2.368) Pub Date : 2019-05-31 Chunghun Ha
This paper proposes a new ant colony optimization (ACO) algorithm suitable for integrated process planning and scheduling (IPPS) that optimizes both process planning and scheduling simultaneously. The IPPS covered in this study, when compared to the conventional IPPS, is more flexible and complicated because sequence-dependent setups and tool-related capacity constraints are additionally considered
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Scheduling approach for on-site jobs of service providers Flex. Serv. Manuf. J. (IF 2.368) Pub Date : 2019-05-25 Tibor Holczinger, Olivér Ősz, Máté Hegyháti
Nowadays the successful operation of a company is unimaginable without fast and reliable communication. As a result, so-called Communication Service Providers play an important role in today’s business life. Their orders have to be carried out promptly and dependably, let them be requests for new installations, modifications, or maintenance tasks. These orders have to be performed at different locations
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Expected shortfall for the makespan in activity networks under imperfect information Flex. Serv. Manuf. J. (IF 2.368) Pub Date : 2019-05-13 Carlo Meloni; Marco Pranzo
This paper deals with the evaluation of the expected shortfall or the conditional value-at-risk for the makespan in scheduling problems represented as temporal networks under incomplete and uncertain information. We consider temporal activity network representations of scheduling problems affected by uncertainties related to the activity durations and we assume that for these uncertainties only incomplete
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Population-based simulation optimization for urban mass rapid transit networks Flex. Serv. Manuf. J. (IF 2.368) Pub Date : 2019-05-10 David Schmaranzer, Roland Braune, Karl F. Doerner
In this paper, we present a simulation-based headway optimization for urban mass rapid transit networks. The underlying discrete event simulation model contains several stochastic elements, including time-dependent demand and turning maneuver times as well as direction-dependent vehicle travel and passenger transfer times. Passenger creation is a Poisson process that uses hourly origin–destination-matrices
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Scheduling outpatient day service operations for rheumatology diseases Flex. Serv. Manuf. J. (IF 2.368) Pub Date : 2019-05-08 Rosita Guido; Giuseppe Ielpa; Domenico Conforti
Appointment scheduling systems represent a method to manage patient waiting lists effectively. This work advances an innovative quantitative approach for the outpatient appointment scheduling problems, based on an optimization model, to manage outpatient Day Service operations. It focuses on outpatient appointment scheduling. We start from earlier works in the literature to design models with the objective
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Pricing and greening strategies for a dual-channel closed-loop green supply chain Flex. Serv. Manuf. J. (IF 2.368) Pub Date : 2019-05-08 C. Mondal; B. C. Giri; T. Maiti
This article considers a closed-loop green supply chain with both forward and reverse dual-channels, where a manufacturer produces and sells a single green product to the potential customers through both the direct online channel (e-tail/internet) and the traditional retail channel in the forward dual-channel, and collects the used products for remanufacturing from the customers through both the retail
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Capacity allocation and revenue sharing in healthcare alliances Flex. Serv. Manuf. J. (IF 2.368) Pub Date : 2019-05-03 Xiaoquan Gao, Jianpei Wen, Jie Song
This study investigates the operations of a healthcare alliance, where two types of independent hospitals [general hospitals (GHs) and community healthcare centers (CHCs)] collaborate in capacity allocation and revenue management to improve efficiency and revenue. Specifically, the GH allocates part of its capacity to establish a dedicated green channel for referral patients from the CHC based on a
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Flexible staffing of physicians with column generation Flex. Serv. Manuf. J. (IF 2.368) Pub Date : 2019-04-24 Melanie Erhard
In Germany, around 40% of the hospitals do not generate an annual surplus. This leads to an increasing pressure on hospitals’ management to reorganize and restructure their processes and resources to decrease the upcoming costs and become profitable. Since personnel, especially physicians, generates a major part of the arising costs, assigning staff efficiently provides an opportunity to decrease associated
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Home healthcare routing and scheduling of multiple nurses in a dynamic environment Flex. Serv. Manuf. J. (IF 2.368) Pub Date : 2019-04-22 Mustafa Demirbilek; Juergen Branke; Arne K. Strauss
Human resource planning in home healthcare is gaining importance day by day since companies in developed and developing countries face serious nurse and caregiver shortages. In the problem considered in this paper, the decision of patient assignment must be made immediately when the patient request arrives. Once patients have been accepted, they are serviced at the same days, times and by same nurse
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Impact of travel time uncertainties on the solution cost of a two-echelon vehicle routing problem with synchronization Flex. Serv. Manuf. J. (IF 2.368) Pub Date : 2019-04-22 Alexandra Anderluh, Rune Larsen, Vera C. Hemmelmayr, Pamela C. Nolz
Two-echelon vehicle routing problems which contain synchronization between vehicles can be deeply impacted by time uncertainty, because one vehicle’s delay can propagate to other vehicles. In this paper, we evaluate the deterministic solution of such a problem based on simulated travel time scenarios. The information obtained by simulation is incorporated in the optimization procedure iteratively.
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A two-level iteration approach for modeling and analysis of rapid response process with multiple deteriorating patients Flex. Serv. Manuf. J. (IF 2.368) Pub Date : 2019-04-15 Zexian Zeng; Zhenghao Fan; Xiaolei Xie; Colleen H. Swartz; Paul DePriest; Jingshan Li
In acute care, a patient’s clinical deterioration is often a precursor to serious and often fatal outcomes. To reduce the severity and frequency of negative outcomes, care providers need to response rapidly by providing quick evaluation, triage, and treatment to patients with declining conditions. However, a provider’s availability to respond can be constrained when multiple patients are deteriorating
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Continuous-time scheduling of production, distribution and sales in photovoltaic supply chains with declining prices Flex. Serv. Manuf. J. (IF 2.368) Pub Date : 2019-04-10 Wolfgang Albrecht; Martin Steinrücke
Supply chain networks in the photovoltaic sector were faced with a rapid decline in prices during the past few years, which is predicted to go on in the following years. These circumstances force related companies to coordinate production, distribution and transportation planning of all their network sites thoroughly. Moreover, continuous-time scheduling of processes is required to determine times
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A multi commodity flow model incorporating flow reduction functions Flex. Serv. Manuf. J. (IF 2.368) Pub Date : 2019-04-08 Bayan Bevrani; Robert L. Burdett; Ashish Bhaskar; Prasad K. D. V. Yarlagadda
In this article an improved multi-commodity network flow (MCNF) model is introduced to holistically assess a multi modal transportation system and to identify the optimal flows achievable. The principal innovation of this model, that distinguishes it from recent approaches, is the inclusion of flow reduction functions (FRF) to automatically scale the flows on specific parts of the network. Reduced
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Designing intervention scheme for vaccine market: a bilevel programming approach. Flex. Serv. Manuf. J. (IF 2.368) Pub Date : 2019-04-06 Ece Zeliha Demirci,Nesim Kohen Erkip
Public-interest goods benefit consumers and also generate external benefits boosting societal welfare. Despite this characteristic of these goods, their level of consumption or production are generally well below the socially desirable levels without intervention. Motivated by influenza vaccine market, this paper examines the intervention design problem for a public-interest good facing yield uncertainty
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Integration of inter-terminal transport and hinterland rail transport Flex. Serv. Manuf. J. (IF 2.368) Pub Date : 2019-03-20 Qu Hu; Bart Wiegmans; Francesco Corman; Gabriel Lodewijks
This paper investigates the problem of inter-terminal movements of containers and vehicles within a port area in order to achieve an integrated and effective transport within the port and towards the hinterland. Containers from different port terminals are first moved to a rail yard and then delivered to the hinterland by rail. To provide insights for stakeholders such as port authority and terminal
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A two-stage robust optimization approach for the berth allocation problem under uncertainty Flex. Serv. Manuf. J. (IF 2.368) Pub Date : 2019-03-19 Changchun Liu; Xi Xiang; Li Zheng
This paper examines the berth allocation problem under uncertainty. We use uncertainty sets to describe the possible scenarios without depending on probabilistic information. Then we adopt a two-stage robust optimization approach where baseline schedule is made before and the recovery operation is made after the disruptions are known. Three two-stage robust models are constructed to generate less conservative
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Multi-period process flexibility with inventory Flex. Serv. Manuf. J. (IF 2.368) Pub Date : 2019-03-11 Philip Kaminsky; Yang Wang
Motivated by challenges faced by a biopharmaceutical firm, we extend the traditional process flexibility modeling literature by integrating inventory storage capabilities into these models, and develop general guidelines on how to design an effective supply chain network in this setting. Given the expense of inventory storage in the biopharmaceutical industry, the firm is considering incorporating
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Fine-grained simulation optimization for the design and operations of a multi-activity clinic Flex. Serv. Manuf. J. (IF 2.368) Pub Date : 2019-03-11 P. Troy; N. Lahrichi; D. Porubska; L. Rosenberg
To ensure that patients are appropriately prepared for surgical procedures in a welcoming environment, the Sir Mortimer B. Davis Jewish General Hospital, a McGill University affiliated teaching hospital located in Montreal, is redesigning and relocating its existing presurgical screening clinic so that it provides additional services and is more patient friendly. Given the services being added, limited
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Comparison of optimal buffer allocation in flow lines under installation buffer, echelon buffer, and CONWIP policies Flex. Serv. Manuf. J. (IF 2.368) Pub Date : 2019-03-05 George Liberopoulos
We compare the optimal buffer allocation of a manufacturing flow line operating under three different production control policies: installation buffer (IB), echelon buffer (EB), and CONWIP (CW). IB is the conventional policy where each machine may store the parts that it produces only in its immediate downstream buffer if the next machine is occupied. EB is a more flexible policy where each machine
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An optimization tool to dimension innovative home health care services with devices and disposable materials Flex. Serv. Manuf. J. (IF 2.368) Pub Date : 2019-02-28 Fabiola Regis-Hernández; Giuliana Carello; Ettore Lanzarone
Home health care (HHC) consists of care services provided to patients at their domicile rather than in hospitals or other health facilities. HHC human resources are largely studied in the optimization literature, to improve service quality and efficiency. However, the growth of complex HHC services that include the delivery of devices and disposable materials makes it necessary to include them in the
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Medical appointment overbooking and optimal scheduling: tradeoffs between schedule efficiency and accessibility to service Flex. Serv. Manuf. J. (IF 2.368) Pub Date : 2019-02-28 Yong-Hong Kuo; Hari Balasubramanian; Yan Chen
Appointment overbooking has been commonly adopted for the mitigation of the adverse consequences of patient no-shows, such as reduced resource utilization and revenue. However, if there are more patients showing up than expected, the resource overtime and patient waiting time can increase. Due to the theoretical interest and the practical importance of the problem, there has been much research on the
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Integrated scheduling of drayage and long-haul operations in synchromodal transport Flex. Serv. Manuf. J. (IF 2.368) Pub Date : 2019-02-27 Arturo E. Pérez Rivera; Martijn R. K. Mes
We study the problem of the integrated scheduling of drayage operations and long-haul transport in synchromodality. Although different in time span and characteristics of execution, these two processes have an impact on each other and their interaction has a direct influence on the overall performance of the transport network over time. We propose a simulation based integration of a Mixed-Integer Linear