Article
Mathematics
Nuramilawahida Mat Ropi, Hawa Hishamuddin, Dzuraidah Abd Wahab, Wakhid Ahmad Jauhari, Fatin Amrina A. Rashid, Nor Kamaliana Khamis, Intan Fadhlina Mohamed, Mohd Anas Mohd Sabri, Mohd Radzi Abu Mansor
Summary: Remanufacturing is a way to satisfy customer demand and maintain production flow, but disruptions such as spare parts shortage can lead to delays and sales loss. This study developed a cost-minimization model to analyze the recovery schedule after disruptions in the sourcing of spare parts for a remanufacturer. The results showed that the optimal recovery schedule and number of recovery cycles depend on disruption time, lost sales, and backorder costs. Spare part costs, overall recovery costs, and supplier readiness also influence a manufacturer's response to disruptions.
Article
Engineering, Industrial
Zhengxin Zhang, Jianxun Zhang, Dangbo Du, Tianmei Li, Xiaosheng Si
Summary: Spare parts are crucial in enhancing reliability, reducing downtime, and minimizing operating costs in prognostics and system health management (PHM). However, the performance degradation of spare parts is often overlooked in lifetime estimation and inventory optimization. This paper integrates the performance degradation of spare parts into lifetime estimation for stochastic multi-component degrading systems. The lifetime distribution considering the performance degradation of spare parts in storage is derived, and a cost function for inventory management optimization is constructed. Simulations and a case study validate the proposed method, highlighting the importance of considering performance degradation in inventory management.
RELIABILITY ENGINEERING & SYSTEM SAFETY
(2023)
Article
Computer Science, Interdisciplinary Applications
Kevin Wesendrup, Bernd Hellingrath
Summary: Production Planning and Control is crucial for manufacturers to achieve competitive advantage through continuous production. To tackle the complexity of post-prognostics PPC, a data-driven Reinforcement Learning model, specifically Proximal Policy Optimisation, is developed. The model outperforms other learners, reactive and scheduled preventive maintenance strategies, and shows robustness in the face of noise and cost changes.
COMPUTERS & INDUSTRIAL ENGINEERING
(2023)
Review
Green & Sustainable Science & Technology
Shuai Zhang, Kai Huang, Yufei Yuan
Summary: The importance of spare parts inventory management is gaining attention, particularly in the pursuit of sustainability. Research in this area is mainly divided into two categories, focusing on spare parts characteristics and research methodologies, and emphasizing supply chain structures and analytical techniques.
Article
Engineering, Industrial
Erna Engebrethsen, Stephane Dauzere-Peres
Summary: The complexity of decision-making in purchasing transportation services has increased due to the availability of more options and pricing schedules. This study focuses on a real-world decision problem faced by a Scandinavian company and proposes a novel multi-mode lot-sizing model to illustrate the cost impact of accurately modeling transportation costs and allowing flexible usage of transportation modes. The study concludes that increasing the flexibility of mode selection in transportation strategies can significantly reduce costs.
INTERNATIONAL JOURNAL OF PRODUCTION RESEARCH
(2023)
Review
Engineering, Industrial
Alessandra Cantini, Mirco Peron, Filippo De Carlo, Fabio Sgarbossa
Summary: Configuring supply chains is crucial for the success of spare parts retailers. This paper introduces a new methodology called SP-LACE, which reviews the configuration of spare parts supply chains and evaluates their economic benefits. The results indicate that SP-LACE provides economic benefits and ensures high service levels, overcoming the limitations of existing literature methodology.
INTERNATIONAL JOURNAL OF PRODUCTION RESEARCH
(2023)
Article
Management
Leandro Reis Muniz, Samuel Vieira Conceicao, Lasara Fabricia Rodrigues, Joao Flavio de Freitas Almeida, Tassia Bolotari Affonso
Summary: This paper presents a new hybrid approach based on criticality analysis and optimization for spare parts inventory management in the mining industry. The study combines qualitative and quantitative methods to obtain the spare parts to be stocked, achieving an increase in criticality and number of items stocked compared to historical data. The proposed approach provides systematic tools for analyzing the trade-off between spare parts criticality and total inventory value.
INTERNATIONAL JOURNAL OF LOGISTICS MANAGEMENT
(2021)
Article
Computer Science, Software Engineering
Hark-Chin Hwang
Summary: This paper introduces an infinite-period model to address the subcontracting and single-item lot-sizing problem with constant capacities, demonstrating the model's practicality by driving the firm's production schedule and subcontractor's supply schedule, introducing the concept of the "shadow period" to determine optimal marginal supply costs, and ultimately proving the success of the model through the concept of the effective period.
MATHEMATICAL PROGRAMMING
(2022)
Article
Computer Science, Interdisciplinary Applications
Adhe Kania, Juha Sipila, Giovanni Misitano, Kaisa Miettinen, Jussi Lehtimaki
Summary: This study addresses the challenges of unpredictable demand and proposes a multiobjective optimization model to integrate a lot sizing problem with safety strategy placement. The proposed model considers four objective functions and is solved using the E-NAUTILUS method. The results demonstrate that the model can help decision makers find the best balance among conflicting objectives.
COMPUTERS & INDUSTRIAL ENGINEERING
(2022)
Review
Management
Cerag Pince, Laura Turrini, Joern Meissner
Summary: Forecasting spare parts demand has been a challenging issue for many companies, and has received considerable attention over the past fifty years. This paper provides a critical review and quantitative analysis of current literature on spare parts demand forecasting methods, offering detailed insights into when and why particular forecasting methods should be preferred.
OMEGA-INTERNATIONAL JOURNAL OF MANAGEMENT SCIENCE
(2021)
Article
Computer Science, Artificial Intelligence
Adhe Kania, Bekir Afsar, Kaisa Miettinen, Juha Sipila
Summary: We propose DESMILS, a decision support approach that tackles multi-item lot sizing problems with a large number of items using single-item multiobjective lot sizing models. DESMILS considers multiple conflicting objective functions and incorporates decision maker preferences to find the most preferred Pareto optimal solutions. Through clustering, DESMILS treats items in a cluster utilizing preferences provided for a representative item. This approach reduces the decision maker's workload and time while still achieving acceptable solutions.
JOURNAL OF INTELLIGENT MANUFACTURING
(2023)
Article
Computer Science, Interdisciplinary Applications
Goncalo Cardeal, Marco Leite, Ines Ribeiro
Summary: This paper aims to contribute to the large-scale adoption of additive manufacturing by proposing and demonstrating a decision-support model that identifies spare parts suitable for AM and supports the definition of optimized warehouse management strategies. The application of the model in the paper and pulp industry demonstrates significant economic gains from properly identifying spare parts and optimizing management strategies. However, there are still environmental difficulties to be overcome for large-scale adoption.
COMPUTERS IN INDUSTRY
(2023)
Article
Management
Yue Zhang, Bram Westerweel, Rob Basten, Jing-Sheng Song
Summary: This study examines how an original equipment manufacturer (OEM) can digitize the spare parts supply chain using 3D printing and intellectual property (IP) licensing. The results show that IP licensing can drive production decentralization in the supply chain, leading to increased profits for the OEM.
M&SOM-MANUFACTURING & SERVICE OPERATIONS MANAGEMENT
(2022)
Article
Computer Science, Interdisciplinary Applications
Hark-Chin Hwang, Wilco Van den Heuvel, Albert P. M. Wagelmans
Summary: We propose a novel dynamic programming algorithm for a single-item multilevel lot-sizing problem with a serial structure, where one level has an inventory capacity. The algorithm combines Zangwill's approach for the uncapacitated problem and the basis-path approach for the production capacitated problem. Computational tests show that our algorithm is significantly faster than the commercial solver CPLEX for reasonably sized instances.
INFORMS JOURNAL ON COMPUTING
(2023)
Article
Management
Edib Gurkan, Huseyin Tunc, S. Armagan Tarin
Summary: A new joint inventory control pricing policy (R, S, p) is proposed and found to be competitive in profit performance under low or moderate demand uncertainty according to a numerical study. Additionally, the relative advantage of using dynamic pricing policy compared to dynamic inventory control diminishes with increasing demand uncertainty.
OMEGA-INTERNATIONAL JOURNAL OF MANAGEMENT SCIENCE
(2022)
Article
Automation & Control Systems
Henrique William Resende Pereira, Roberto Kawakami Harrop Galvao, Takashi Yoneyama
Summary: This paper focuses on predictive control of nonlinear systems using the Carleman bilinearization technique. By combining Carleman's approximation with a fixed search directions algorithm, improvements in stability, constraint satisfaction, and reduced computational effort are observed. Simulations show that the proposed method outperforms traditional methods in various aspects.
ASIAN JOURNAL OF CONTROL
(2021)
Article
Automation & Control Systems
Leonardo Ramos Rodrigues, Takashi Yoneyama
Summary: This paper proposed a novel repair priority rule based on a Prognostics and Health Monitoring system, and numerical experiments showed that it consistently reduces inventory system cost.
Article
Automation & Control Systems
Dayvis Dias da Silva, Wallace Turcio, Takashi Yoneyama
CONTROL ENGINEERING PRACTICE
(2020)
Article
Neurosciences
Fabio Godinho, Arnaldo Fim Neto, Bruno Leonardo Bianqueti, Julia Baldi de Luccas, Eduardo Varjao, Paulo Roberto Terzian Filho, Eberval Gadelha Figueiredo, Tiago Paggi Almeida, Takashi Yoneyama, Andre Kazuo Takahata, Maria Sheila Rocha, Diogo Coutinho Soriano
Summary: Parkinson's disease patients exhibit differences in STN-LFP beta-band activity between tremor dominant (TD) and postural instability and gait disorder (PIGD) motor phenotypes, especially during rest and movement states. Movement-induced desynchronization patterns in alpha-beta range vary in TD (10-20 Hz) and PIGD patients (21-28 Hz), leading to improved classification accuracy when considering movement information. These findings suggest that STN-LFP beta-band encodes phenotype-movement dependent information in PD patients.
EUROPEAN JOURNAL OF NEUROSCIENCE
(2021)
Article
Engineering, Biomedical
Tiago P. Almeida, Diogo C. Soriano, Michela Mase, Flavia Ravelli, Arthur S. Bezerra, Xin Li, Gavin S. Chu, Joao Salinet, Peter J. Stafford, G. Andre Ng, Fernando S. Schlindwein, Takashi Yoneyama
Summary: Utilizing unsupervised classification and AEG-derived markers, five distinct classes of AEGs were identified with significant differences in characteristics, potentially offering a more comprehensive substrate characterization for ablation target identification in future clinical studies.
IEEE TRANSACTIONS ON BIOMEDICAL ENGINEERING
(2021)
Article
Computer Science, Information Systems
Filipe Rodrigues De Souza Moreira, Filipe Alves Neto Verri, Takashi Yoneyama
Summary: This article introduces a new time series forecasting method called Maximum Visibility Approach (MVA), which is based on the Complex Network theory. MVA maps time series data into a complex network using the visibility graph method and calculates forecasts based on the similarity measures between nodes. The experimental results demonstrate that MVA outperforms other forecasting methods.
Article
Engineering, Electrical & Electronic
Henrique Mohallem Paiva, Roberto Kawakami Harrop Galvao, Sillas Hadjiloucas, Takashi Yoneyama, Matheus Henrique Marcolino
Summary: This paper proposes a novel one-port passive circuit topology which can be used as a fault-tolerant building block for analog circuit design. The effect of simultaneous faults in random network elements on the frequency-domain admittance profile is described using analytical and Monte Carlo methods.
INTERNATIONAL JOURNAL OF CIRCUIT THEORY AND APPLICATIONS
(2022)
Article
Computer Science, Artificial Intelligence
Alexandre F. V. Muzio, Marcos R. O. A. Maximo, Takashi Yoneyama
Summary: RoboCup 3D Soccer Simulation is a robot soccer competition that uses a high-fidelity simulator and autonomous humanoid agents. This article focuses on learning humanoid robot behaviors and evaluates the effectiveness of the learned dribble policy in the Soccer 3D environment.
JOURNAL OF INTELLIGENT & ROBOTIC SYSTEMS
(2022)
Article
Computer Science, Information Systems
Joao P. A. Dantas, Marcos R. O. A. Maximo, Andre N. Costa, Diego Geraldo, Takashi Yoneyama
Summary: This article presents an AI model that uses artificial neural networks to improve the situational awareness of BVR air combat pilots. The model generates behaviors in a simulation environment and utilizes machine learning to enhance decision making in offensive and defensive situations.
IEEE LATIN AMERICA TRANSACTIONS
(2022)
Proceedings Paper
Cardiac & Cardiovascular Systems
Tiago P. Almeida, Mark Nothstein, Xin Li, Michela Mase, Flavia Ravelli, Diogo C. Soriano, Arthur S. Bezerra, Fernando S. Schlindwein, Takashi Yoneyama, Olaf Doessel, G. Andre Ng, Axel Loewe
2020 COMPUTING IN CARDIOLOGY
(2020)
Proceedings Paper
Cardiac & Cardiovascular Systems
Arthur S. Bezerra, Takashi Yoneyama, Diogo C. Soriano, Giorgio Luongo, Xin Li, Flavia Ravelli, Michela Mase, Gavin S. Chu, Peter J. Stafford, Fernando S. Schlindwein, G. Andre Ng, Tiago P. de Almeida
2020 COMPUTING IN CARDIOLOGY
(2020)
Article
Automation & Control Systems
Vandilberto P. Pinto, Roberto K. H. Galvao, Leonardo R. Rodrigues, Joao Paulo P. Gomes
JOURNAL OF CONTROL AUTOMATION AND ELECTRICAL SYSTEMS
(2020)
Article
Computer Science, Interdisciplinary Applications
Xiaolin Wang, Liyi Zhan, Yong Zhang, Teng Fei, Ming-Lang Tseng
Summary: This study proposes an environmental cold chain logistics distribution center location model to reduce transportation costs and carbon emissions. It also introduces a hybrid arithmetic whale optimization algorithm to overcome the limitations of the conventional algorithm.
COMPUTERS & INDUSTRIAL ENGINEERING
(2024)
Article
Computer Science, Interdisciplinary Applications
Hong-yu Liu, Shou-feng Ji, Yuan-yuan Ji
Summary: This study proposes an architecture that utilizes Ethereum to investigate the production-inventory-delivery problem in Physical Internet (PI), and develops an iterative heuristic algorithm that outperforms other algorithms. However, due to gas prices and consumption, blockchain technology may not always be the optimal solution.
COMPUTERS & INDUSTRIAL ENGINEERING
(2024)
Article
Computer Science, Interdisciplinary Applications
Paraskevi Th. Zacharia, Elias K. Xidias, Andreas C. Nearchou
Summary: This article discusses the assembly line balancing problem in production lines with collaborative robots. Collaborative robots have the potential to improve automation, productivity, accuracy, and flexibility in manufacturing. The article explores the use of a problem-specific metaheuristic to solve this complex problem under uncertainty.
COMPUTERS & INDUSTRIAL ENGINEERING
(2024)