Mehmet TanyaŞ | Maltepe University (original) (raw)
Papers by Mehmet TanyaŞ
2007 1st Annual RFID Eurasia, 2007
There is no doubt that managing the flow of goods depends on monitoring the real flow in the phys... more There is no doubt that managing the flow of goods depends on monitoring the real flow in the physical world meanwhile in the digital world. Today automatic identification (auto-ID) technologies are used to close the gap between these two different environments by online updating of databases as the materials flow in the chain. From this point of view, we can say that auto-ID technologies are core components of automated inventory control systems on all echelons of supply chain. As being a novel sub-component of auto-ID, RFID innovates important features. Although developments in RFID technology begun nearly 50 years ago, recent advances provided new opportunities improving commerce and everyday life. New applications and obligations (like the obligations that are put forward by Wal-Mart to its suppliers) bring forth different aspects. Due to the fact that RFID is a recently developed technology, there exist some deficiencies, like the lack of standardization and the lack of legislation regulations, that cause questions about privacy and security in society. In this study, we reviewed the standardization studies of related organizations like EPCglobal and ISO, compare these and find the gaps. We also classify the risks that threaten the privacy of individuals and organizations. Finally, regarding the standardization studies and existing risks towards the privacy of individuals and organizations, security proposals and policy suggestions are introduced.
Trafik ve Ulaşım Araştırmaları Dergisi
Çalışmanın amacı büyük şehirler için çevre yolunda dinamik trafik akışına uygun düzenlemelerle ak... more Çalışmanın amacı büyük şehirler için çevre yolunda dinamik trafik akışına uygun düzenlemelerle akışı iyileştirerek emisyonu azaltmak, seyahat süresini uzatan beklemeleri azaltarak yakıt tasarrufu sağlamaktır. Bir çevre yolundaki trafik akışı için farklı kuralları içeren senaryolar Goldratt Research Labs tarafından AnyLogic üzerinde hazırlanan Traffic Flow paket simülatörü kullanılarak operasyonel bazda kıyaslanmıştır. Yaygın kullanılan statik ve sensörlerle desteklenen hibrit uygulamalar yerine trafik yoğunluğuna dayalı katılım sınırı içeren dinamik sistem kullanıldığında yoldan geçen araç sayısı artmakta ve seyahat süresi kısalmaktadır. Büyüyen şehirler ve artan lojistik hacim çevre yol düzenlemesini gerektirmektedir. Özellikle transit geçişlerdeki yerleşim yerlerinde ve trafik yoğunluğu yaşanan büyük şehirlerde mevcut trafik sensörleriyle bağlantılı olarak kullanılabilecektir. Çevre yolu trafik düzenlemeleri arasında İstanbul’da uygulanmayan akıllı sinyalizasyon, yan yolun akıllı ...
Routledge eBooks, Jun 8, 2023
Journal of Enterprise Information Management
PurposeThe primary objective of this study is to investigate the application of blockchain techno... more PurposeThe primary objective of this study is to investigate the application of blockchain technology (BCT) in the agri-food supply chain, focusing on traceability and food safety.Design/methodology/approachThe study employed a semi-structured interview method with representatives from the cherry supply chain to evaluate their awareness and acceptance of BCT's impact. Additionally, the analytic hierarchy process (AHP) was utilized to determine digital investment priorities in supply chain strategies. By applying the supply chain operations reference (SCOR) model framework to the cherry supply chain, the study aimed to address the question “Which process model is suitable for implementing BCT in the agri-food supply chain?”FindingsThe global agri-food supply chains are characterized by significant food losses, escalating prices along the chain, and food safety risks. Concurrently, consumer concerns regarding food safety, quality and transparency are on the rise. BCT, with its abi...
Lecture notes in networks and systems, Nov 15, 2022
Maltepe Üniversitesi, Sosyal Bilimler Enstitüsü, 2017
Maltepe Üniversitesi eBooks, 2010
In today's business environment with the availability of information and communication techno... more In today's business environment with the availability of information and communication technology, it is possible by the members of the supply chain to coordinate the main business activities together to satisfy the end-customer requirements. In this study, we present a simulation model for measuring the impact of collaboration on forecasting and replenishment activities in capacitated supply chains. For this purpose, we consider two stylized supply chain structures. In the first case, there is no collaboration in the supply chain and all the members try to optimize its own organization by using only local information available. However, in the second case, a single demand forecast is generated together with all the members and replenishment activities are coordinated by sharing inventory related information and overall structure of the supply chain. From this analysis, the impact of production capacity, variability of demand and lead time on possible improvements achieved by th...
Although it is well-defined and there have been enormous studies in literature, the bullwhip effe... more Although it is well-defined and there have been enormous studies in literature, the bullwhip effect also known as " demand amplification " is still a big problem for today's business world. Many researchers have worked on this phenomenon to understand the underlying reasons and developed various strategies to eliminate it with different approaches. Also, various researchers have tried to analyze the impact of these strategies on the supply chain performance. In this paper, a literature review of various studies used to analyze bullwhip effect is undertaken. They are categorized as system dynamics discipline, statistics & operations research discipline, and control engineering discipline. Findings of each category is then systematically reported and compared in order to see the whole picture and better cope with this phenomenon.
⎯ Quality performance criteria are being used effectively to improve customer-supplier relationsh... more ⎯ Quality performance criteria are being used effectively to improve customer-supplier relationship and many research studies have been done on the subject. Logistics Service Providers (LSPs) are being evaluated through performance criteria by their customers. LSPs also ...
SSRN Electronic Journal, 2012
Purpose − The study examines the supply chain complexity concept and discusses how current supply... more Purpose − The study examines the supply chain complexity concept and discusses how current supply chain management initiatives (in terms of activities, tools, and information technologies) contribute to complexity management in the supply chain. Design/methodology/approach − A literature review was conducted regarding complexity management in the supply chain. This was followed by a questionnaire survey that focused on the current efforts of companies regarding supply chain management initiatives and complexity in their supply chain. Findings − The literature review shows that supply chain management initiatives contribute to the efforts of companies to deal with complexity in the supply chain, especially in managing interactions, and reducing uncertainty. The survey results support these findings. Practical implications − The results of the survey provide insight into the capabilities to focus on when dealing with supply chain complexity. Originality/value − The study reflects how current supply chain management activities, tools and enabling technologies contribute to dealing with complexity in the supply chain and provides a starting point for further research in complexity management in the supply chain.
International Journal of Research in Commerce and Management Studies
Research in Logistics and Production, 2015
Warehouses are essential components of any supply chain in terms of customer service and cost lev... more Warehouses are essential components of any supply chain in terms of customer service and cost levels. Warehouses are one of the important players in the success or failure of businesses from not only the customer service levels perspective but also the cost perspective. Warehouses, as one of the important components of supply networks, should be continually improved from design and operation perspectives to increase the performance. All efforts and solutions regarding the performance improvement are important and complex. In other words, warehouses should operate effectively in terms of the costs and technical performance that are determined during the design phase of warehouses. There are a few studies in the literature regarding the calculations of the optimum dimensions of a warehouse along the x, y, and z directions. In this paper, an analytical model is proposed to achieve the optimum warehouse dimensions in terms of the number of stocking zones along each of three dimensional ...
Journal of Turkish Operations Management
Afetler, bir toplumun işleyişinde kendi kaynaklarını kullanarak başa çıkma kapasitesini aşan cidd... more Afetler, bir toplumun işleyişinde kendi kaynaklarını kullanarak başa çıkma kapasitesini aşan ciddi aksamalardır. Afetler, doğal, insan yapımı ve teknolojik tehlikelerin yanı sıra bir topluluğun maruziyetini ve savunmasızlığını etkileyen çeşitli faktörlerden kaynaklanabilir. Afet risklerinin azaltılması, toplulukların daha hazırlıklı, dirençli olması ve verdiği zararların azaltılabilmesi için etkin bir afet yönetimi ve lojistiği gerekmektedir. Birçok konuda olduğu gibi afet yönetim lojistiği sürecinin de çevreye ve topluma uyumlu olması aynı zamanda da ekonomik boyutu dikkate alması artık bir zorunluluktur. Bu nedenle ülkelerin/organizasyonların etkin, verimli ve sürdürülebilir afet lojistiği politikalarına sahip olmaları önem arz etmektedir. Sürdürülebilir afet yönetimi lojistiği konusunda son yıllarda akademik çalışma sayılarında gözle görülür bir artış gözlemlenmiştir. Bu artış aynı zamanda bu alanda kapsamlı bir literatür taraması ihtiyacı doğurmuştur. Bu çalışmanın amacı sürdürü...
2007 1st Annual RFID Eurasia, 2007
There is no doubt that managing the flow of goods depends on monitoring the real flow in the phys... more There is no doubt that managing the flow of goods depends on monitoring the real flow in the physical world meanwhile in the digital world. Today automatic identification (auto-ID) technologies are used to close the gap between these two different environments by online updating of databases as the materials flow in the chain. From this point of view, we can say that auto-ID technologies are core components of automated inventory control systems on all echelons of supply chain. As being a novel sub-component of auto-ID, RFID innovates important features. Although developments in RFID technology begun nearly 50 years ago, recent advances provided new opportunities improving commerce and everyday life. New applications and obligations (like the obligations that are put forward by Wal-Mart to its suppliers) bring forth different aspects. Due to the fact that RFID is a recently developed technology, there exist some deficiencies, like the lack of standardization and the lack of legislation regulations, that cause questions about privacy and security in society. In this study, we reviewed the standardization studies of related organizations like EPCglobal and ISO, compare these and find the gaps. We also classify the risks that threaten the privacy of individuals and organizations. Finally, regarding the standardization studies and existing risks towards the privacy of individuals and organizations, security proposals and policy suggestions are introduced.
Trafik ve Ulaşım Araştırmaları Dergisi
Çalışmanın amacı büyük şehirler için çevre yolunda dinamik trafik akışına uygun düzenlemelerle ak... more Çalışmanın amacı büyük şehirler için çevre yolunda dinamik trafik akışına uygun düzenlemelerle akışı iyileştirerek emisyonu azaltmak, seyahat süresini uzatan beklemeleri azaltarak yakıt tasarrufu sağlamaktır. Bir çevre yolundaki trafik akışı için farklı kuralları içeren senaryolar Goldratt Research Labs tarafından AnyLogic üzerinde hazırlanan Traffic Flow paket simülatörü kullanılarak operasyonel bazda kıyaslanmıştır. Yaygın kullanılan statik ve sensörlerle desteklenen hibrit uygulamalar yerine trafik yoğunluğuna dayalı katılım sınırı içeren dinamik sistem kullanıldığında yoldan geçen araç sayısı artmakta ve seyahat süresi kısalmaktadır. Büyüyen şehirler ve artan lojistik hacim çevre yol düzenlemesini gerektirmektedir. Özellikle transit geçişlerdeki yerleşim yerlerinde ve trafik yoğunluğu yaşanan büyük şehirlerde mevcut trafik sensörleriyle bağlantılı olarak kullanılabilecektir. Çevre yolu trafik düzenlemeleri arasında İstanbul’da uygulanmayan akıllı sinyalizasyon, yan yolun akıllı ...
Routledge eBooks, Jun 8, 2023
Journal of Enterprise Information Management
PurposeThe primary objective of this study is to investigate the application of blockchain techno... more PurposeThe primary objective of this study is to investigate the application of blockchain technology (BCT) in the agri-food supply chain, focusing on traceability and food safety.Design/methodology/approachThe study employed a semi-structured interview method with representatives from the cherry supply chain to evaluate their awareness and acceptance of BCT's impact. Additionally, the analytic hierarchy process (AHP) was utilized to determine digital investment priorities in supply chain strategies. By applying the supply chain operations reference (SCOR) model framework to the cherry supply chain, the study aimed to address the question “Which process model is suitable for implementing BCT in the agri-food supply chain?”FindingsThe global agri-food supply chains are characterized by significant food losses, escalating prices along the chain, and food safety risks. Concurrently, consumer concerns regarding food safety, quality and transparency are on the rise. BCT, with its abi...
Lecture notes in networks and systems, Nov 15, 2022
Maltepe Üniversitesi, Sosyal Bilimler Enstitüsü, 2017
Maltepe Üniversitesi eBooks, 2010
In today's business environment with the availability of information and communication techno... more In today's business environment with the availability of information and communication technology, it is possible by the members of the supply chain to coordinate the main business activities together to satisfy the end-customer requirements. In this study, we present a simulation model for measuring the impact of collaboration on forecasting and replenishment activities in capacitated supply chains. For this purpose, we consider two stylized supply chain structures. In the first case, there is no collaboration in the supply chain and all the members try to optimize its own organization by using only local information available. However, in the second case, a single demand forecast is generated together with all the members and replenishment activities are coordinated by sharing inventory related information and overall structure of the supply chain. From this analysis, the impact of production capacity, variability of demand and lead time on possible improvements achieved by th...
Although it is well-defined and there have been enormous studies in literature, the bullwhip effe... more Although it is well-defined and there have been enormous studies in literature, the bullwhip effect also known as " demand amplification " is still a big problem for today's business world. Many researchers have worked on this phenomenon to understand the underlying reasons and developed various strategies to eliminate it with different approaches. Also, various researchers have tried to analyze the impact of these strategies on the supply chain performance. In this paper, a literature review of various studies used to analyze bullwhip effect is undertaken. They are categorized as system dynamics discipline, statistics & operations research discipline, and control engineering discipline. Findings of each category is then systematically reported and compared in order to see the whole picture and better cope with this phenomenon.
⎯ Quality performance criteria are being used effectively to improve customer-supplier relationsh... more ⎯ Quality performance criteria are being used effectively to improve customer-supplier relationship and many research studies have been done on the subject. Logistics Service Providers (LSPs) are being evaluated through performance criteria by their customers. LSPs also ...
SSRN Electronic Journal, 2012
Purpose − The study examines the supply chain complexity concept and discusses how current supply... more Purpose − The study examines the supply chain complexity concept and discusses how current supply chain management initiatives (in terms of activities, tools, and information technologies) contribute to complexity management in the supply chain. Design/methodology/approach − A literature review was conducted regarding complexity management in the supply chain. This was followed by a questionnaire survey that focused on the current efforts of companies regarding supply chain management initiatives and complexity in their supply chain. Findings − The literature review shows that supply chain management initiatives contribute to the efforts of companies to deal with complexity in the supply chain, especially in managing interactions, and reducing uncertainty. The survey results support these findings. Practical implications − The results of the survey provide insight into the capabilities to focus on when dealing with supply chain complexity. Originality/value − The study reflects how current supply chain management activities, tools and enabling technologies contribute to dealing with complexity in the supply chain and provides a starting point for further research in complexity management in the supply chain.
International Journal of Research in Commerce and Management Studies
Research in Logistics and Production, 2015
Warehouses are essential components of any supply chain in terms of customer service and cost lev... more Warehouses are essential components of any supply chain in terms of customer service and cost levels. Warehouses are one of the important players in the success or failure of businesses from not only the customer service levels perspective but also the cost perspective. Warehouses, as one of the important components of supply networks, should be continually improved from design and operation perspectives to increase the performance. All efforts and solutions regarding the performance improvement are important and complex. In other words, warehouses should operate effectively in terms of the costs and technical performance that are determined during the design phase of warehouses. There are a few studies in the literature regarding the calculations of the optimum dimensions of a warehouse along the x, y, and z directions. In this paper, an analytical model is proposed to achieve the optimum warehouse dimensions in terms of the number of stocking zones along each of three dimensional ...
Journal of Turkish Operations Management
Afetler, bir toplumun işleyişinde kendi kaynaklarını kullanarak başa çıkma kapasitesini aşan cidd... more Afetler, bir toplumun işleyişinde kendi kaynaklarını kullanarak başa çıkma kapasitesini aşan ciddi aksamalardır. Afetler, doğal, insan yapımı ve teknolojik tehlikelerin yanı sıra bir topluluğun maruziyetini ve savunmasızlığını etkileyen çeşitli faktörlerden kaynaklanabilir. Afet risklerinin azaltılması, toplulukların daha hazırlıklı, dirençli olması ve verdiği zararların azaltılabilmesi için etkin bir afet yönetimi ve lojistiği gerekmektedir. Birçok konuda olduğu gibi afet yönetim lojistiği sürecinin de çevreye ve topluma uyumlu olması aynı zamanda da ekonomik boyutu dikkate alması artık bir zorunluluktur. Bu nedenle ülkelerin/organizasyonların etkin, verimli ve sürdürülebilir afet lojistiği politikalarına sahip olmaları önem arz etmektedir. Sürdürülebilir afet yönetimi lojistiği konusunda son yıllarda akademik çalışma sayılarında gözle görülür bir artış gözlemlenmiştir. Bu artış aynı zamanda bu alanda kapsamlı bir literatür taraması ihtiyacı doğurmuştur. Bu çalışmanın amacı sürdürü...