Author
Lucas Martins Ikeziri
Bio: Lucas Martins Ikeziri is an academic researcher from Sao Paulo State University. The author has contributed to research in topics: Theory of constraints & Supply chain. The author has an hindex of 2, co-authored 4 publications receiving 38 citations.
Papers
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TL;DR: The results show that TOC is in continuous development with a trend of growth and therefore demands additional inquiry, and offers avenues for future research on how to advance the extant literature of TOC.
Abstract: This paper presents a bibliometric analysis of the Theory of Constraints (TOC) research i.e. a total of 1009 journal articles published since 1984. From a bibliometric point of view, the state of t...
48 citations
TL;DR: The results show the robustness of DBM, showing good performance – even if not the best – in any scenario and for all indicators, however, it can recommend adjustments to inventory levels even when the demand and replenishment time have not changed, leading to unnecessary and damaging optimizations within the system noise.
Abstract: This research aims to evaluate how effective the Dynamic Buffer Management (DBM) method is for dynamically adjusting stock levels in order to both preserve the availability of finished goods in dis...
5 citations
01 Jan 2020
4 citations
TL;DR: Inventory management in supply chains faces several typical problems, such as low turnover, high inventory investments, lost sales due to a stockout of certain items and surpluses of these same items as mentioned in this paper.
Abstract: Inventory management in supply chains faces several typical problems, such as low turnover, high inventory investments, lost sales due to a stockout of certain items and surpluses of these same ite...
2 citations
TL;DR: Theory of Constraints TOC as discussed by the authors focuses on the fluxo and, se não houver indícios de mudanças na demanda, deve-se repor a quantidade vendida, assumindo um compromisso with o mercado.
Abstract: Em ambientes produtivos para estoque (Make-to-Stock), é comum se deparar com alguns desafios, como baixa rotatividade e altos investimentos em estoques, rupturas, vendas perdidas e alta obsolescência do estoque. Para lidar com esses obstáculos, a Teoria das Restrições (Theory of Constraints TOC) foca no fluxo e, se não houver indícios de mudanças na demanda, deve-se repor a quantidade vendida, assumindo um compromisso com o mercado. Para tanto, quando o recurso restritivo tem capacidade estritamente superior à demanda, a TOC propõe um sistema de planejamento e controle da produção chamado Tambor-Pulmão-Corda Simplificado (TPC-S) que, aplicado em um ambiente Make-to-Stock, recebe o nome de make-to-availability (GP) e uma forma de sequenciamento, monitoramento e controle chamado Gerenciamento do Pulmão (GP). Com a finalidade de avaliar o desempenho do GP frente a outras regras de sequenciamento, tais como o FIFO (First-In-First-Out), o SPT (Sortest-Process-Time) e o IFA (Índice de Falta), mensurando o desempenho pelo indicador Fill Rate, foi construído um modelo no software Anylogic que representa uma linha de produção fictícia, simulando diferentes cenários. Os resultados permitem concluir que a regra do GP permite aumentar o desempenho do sistema.
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TL;DR: In this article, a critical analysis of various performance metrics for supply chain management (SCM) used by a specific manufacturing company is presented, and the authors summarize how economic theory treats multiple performance metrics.
Abstract: This survey paper starts with a critical analysis of various performance metrics for supply chain management (SCM), used by a specific manufacturing company. Then it summarizes how economic theory treats multiple performance metrics. Actually, the paper proposes to deal with multiple metrics in SCM via the balanced scorecard — which measures customers, internal processes, innovations, and finance. To forecast how the values of these metrics will change — once a supply chain is redesigned — simulation may be used. This paper distinguishes four simulation types for SCM: (i) spreadsheet simulation, (ii) system dynamics, (iii) discrete-event simulation, and (iv) business games. These simulation types may explain the bullwhip effect, predict fill rate values, and educate and train users. Validation of simulation models requires sensitivity analysis; a statistical methodology is proposed. The paper concludes with suggestions for a possible research agenda in SCM. A list with 50 references for further study is included.
338 citations
TL;DR: The top 10 main components of the tools used for quality improvement, enabling factors, benefits, and barriers to implementation are provided and categorization of quality improvement methods and the way toward ZDM are discussed.
Abstract: In the competitive market of manufacturing, quality is a criterion of primary importance in order to win market share. Quality improvement must be coupled with performance point of view. Lean management, Six sigma, Lean Six Sigma, Total Quality Management, Theory of Constraints, and their combination are philosophies dedicated to this goal. This study is a literature review on the implementation of these philosophies to improve quality of processes and products in a system, and also covers the commonalities and differences with Zero Defect Manufacturing philosophy. In this study, 45 articles have been analyzed. These articles have been selected by a research on several scientific libraries with specific keywords. The methodology is based on a list of information extracted from each paper. The data searched are on the tool selections, critical factors of implementations and the benefits obtained from them. Based on the review and analysis of the literature and practices, we provide the top 10 main components of the tools used for quality improvement, enabling factors, benefits, and barriers to implementation. Moreover, we present and discuss categorization of quality improvement methods, and the way toward zero defect manufacturing. The need of standardized toolkits for different levels of maturity in quality management systems and a better education have been enlightened. Thanks to technological improvement in information flow management, Zero Defect Manufacturing (ZDM) seems close to be achieved even though some new risks and wastes have to be taken care of within the implementation.
59 citations
TL;DR: In this paper, the authors present integrated manufacturing systems, a set of techniques for integrating manufacturing systems and their applications in the field of software-defined manufacturing systems (SMSs).
Abstract: (1975). Integrated Manufacturing Systems. Journal of the Operational Research Society: Vol. 26, Volume 26, issue 4, pp. 891-891.
32 citations
TL;DR: In this article, the authors introduce the concept of constraint-based thinking to drive the frugal product development process based on constraints, which is operationalized through a systematic and iterative process to investigate the visible and underlying symptoms of different types of constraints.
Abstract: While thinking in constraints is a key element of frugal innovation, it remains underexplored in the context of developing frugal innovations. Based on insights from the literature and two cases from the medical device industry, this article introduces the concept of constraint-based thinking to drive the frugal product development process based on constraints. This approach is operationalized through a systematic and iterative process to investigate the visible and underlying symptoms of different types of constraints, which are then mapped to specific product features and requirements. It consists of a problem space and a solution space, which are based on the idea that constraints are opportunities to develop innovative solutions. The main components of the constraint-based thinking approach are as follows: first, the identification of constraints or existing limitations, hindrances behind the current status quo that need to be changed; second, a root-cause analysis to understand the underlying causes for each of the identified constraints; third, a mapping of each of those causes to specific product characteristics or requirements; and, fourth, development of a minimal viable product or a prototype. This approach can be used both by companies to develop frugal innovations and by researchers to further develop the link between constraints and new products and services.
21 citations