Analyzing the Solutions of DEA Through Information Visualization and Data Mining Techniques: SmartDEA Framework

Data envelopment analysis (DEA) has proven to be a useful tool for assessing e
fficiency or productivity of organizations, which is of vital practical importance in managerial decision making. DEA provides a significant amount of information from which analysts and managers derive insights and guidelines to promote their existing performances. Regarding to this fact, e
ffective and methodologic analysis and interpretation of DEA solutions are very critical. The main objective of this study is then to develop a general decision support system (DSS) framework to analyze the solutions of basic DEA models. The paper formally shows how the solutions of DEA models should be structured so that these solutions can be examined and interpreted by analysts through information visualization and data mining techniques e
ectively. An innovative and convenient DEA solver, SmartDEA, is designed and developed in accordance with the proposed analysis framework. The developed software provides a DEA solution which is consistent with the framework and is ready-to-analyze with data mining tools, through a table-based structure. The developed framework is tested and applied in a real world project for benchmarking the vendors of a leading Turkish automotive company. The results show the e
ectiveness and the effi
cacy of the proposed framework.

Akçay, A.E., Ertek, G., Büyüközkan, G. “Analyzing the solutions of DEA through information visualization and data mining techniques: SmartDEA framework”. “Expert Systems with Applications”. 39, pp. 7763–7775.

Note: This is the final draft version of this paper. Please cite this paper (or this final draft) as above.
Download
Analyzing the solutions of DEA through information visualization and data mining techniques: SmartDEA framework

Dr. Gürdal Ertek recommends the following related books:

 

 

 

Tagged : /

Cross-cultural training: a crucial approach to improve the success of expatriate assignment in the United Arab Emirates

Cross Cultural Training United Arab Emirates (UAE)

Download the paper

Expatriate training and development is progressively turning into a crucial human resource development issue for the multinational corporations (MNCs). The motivation for this study is to explore the impact of cross- cultural training (CCT) on the adjustment challenges of Western expatriate managers in the UAE. The findings indicate that the expatriate managers, who were provided with CCT, adjusted more rapidly in their international assignment in the UAE than the expatriates who were not provided with any CCT. This research has nevertheless demonstrated that not only are MNCs in the UAE failing to provide adequate CCT and support for their expatriates, but they are also providing inadequate CCT and support to the expatriate’s accompanying family members. The present study contributes to the discussion about whether MNCs routinely provide their expatriate managers with sufficient CCT. Furthermore, this study has substantial implications for managers and proposes areas for future research in this field.

Please cite the paper as follows:

Tahir, R., Ertek, G. (2018) Cross-cultural training: a crucial approach to improve the success of expatriate assignment in the United Arab Emirates. Middle East Journal of Management 2018 – Vol. 5, No.1 pp. 50 – 74.

 

 

Tagged :

Crossdocking Insights from a Third Party Logistics Firm in Turkey

In the book “The Silk Road: Two Thousand Years in the Heart of Asia,” Wood (2002) remarkably suggests that “the very name of ‘Silk Road’ is somewhat misleading.” Wood explains as follows: “It [the name ‘Silk Road’] suggests a continuous journey, whereas goods were in fact transported by a series of routes, a series of agents, passing through many hands before they reached their ultimate destination.”

It’s striking to realize that the Silk Road was a complete “crossdocking” operation, executed on a geographically dispersed collection of hubs and routes. Products neither traveled on a single route nor were they stored on the way. Rather, they were staged for short periods at the hubs, and then were passed on towards the next hub on the route, typically by a new caravan or transportation mode.

Today, crossdocking is still very important and popular. Crossdocking has a great potential to bring great financial and time savings in logistics. For example, most of the logistics success of Wal-Mart, the world’s leading retailer, is attributed to crossdocking.

In this chapter, different types of crossdocking are reviewed, and the crossdocking applications of a 3rd party logistics firm based in Istanbul, Turkey is presented. Istanbul was one of the two final destinations on the Silk Road, together with Rome. Today, it is home to best practices of crossdocking by a multitude of logistics companies, including the company described in this chapter.

Crossdocking is a supply chain strategy that can accomplish significant reductions in total costs and in lead times in a supply chain. In this strategy, crossdock facilities (CFs) act as transfer points where inbound product flow is synchronized with outbound product flow to essentially eliminate storage of inventory. Two other strategies applied in distribution of products are traditional distribution with warehouses and direct shipment (Simchi-Levi et al., 2003).

In traditional distribution with warehouses, the warehouse typically houses activities of receiving, putaway, storage, replenishment, order picking, and shipping. Storage is well known to contribute greatly to costs due to inventory holding. Order picking is well known to contribute greatly to costs, due to labor requirements or the investments in costly automated equipment (Frazelle, 2001). In pure crossdocking, the activites carried out are receiving, staging, and shipping. Staging of products should last for a very limited time span, such as 24 hours, for the facility to be considered a CF.

Increased competition in almost every industry, especially retail and grocery industries, has been pushing companies to search for ways of reducing costs throughout the supply chain. For example, grocery retailers and distributors operate under profit margins of approximately 1.5% (Modern Materials Handling, 2003). Cooperating with supply chain partners to reduce the system-wide costs throughout the supply chain and sharing the benefits is a strategy followed by many companies. The Internet allows companies to communicate among each other in real time at costs significantly lower than the past, when establishing Electronic Data Interchange (EDI) systems was required for real time communication (Brockmann, 1999). These listed factors have increased the applicability of crossdocking as a supply chain strategy.

Crossdocking in various forms has been in use for a long time, especially by package delivery companies. However, its recent popularity can be attributed to its extensive use by Wal-Mart, which implemented this strategy successfully and eventually became the world’s largest retailer with more than 5,000 stores throughout the world (Stalk et al., 1992).

Napolitano (2000) provides practical guidelines to planning, designing, and implementing a crossdock operation. This paper firstly provides a brief tutorial on crossdocking through a review of literature, covering Napolitano (2000) and other sources. Then a case study that describes the crossdocking operations of Ekol Logistics, a leading 3rd party logistics firm in Turkey, is presented. The challenges faced by this firm in implementing crossdocking are listed, and insights are summarized.

Ertek, G., (2012) “Crossdocking Insights from a Third Party Logistics Firm in Turkey”, in Managing Supply Chains on the Silk Road: Strategy, Performance, and Risk,  Eds: Çağrı Haksöz, Sridhar Seshadri and Ananth V. Iyer.

Note: This is the final draft version of this paper. Please cite this paper (or this final draft) as above.

Download
Crossdocking Insights from a Third Party Logistics Firm in Turkey

Dr. Gürdal Ertek recommends the following related books:

 

 

 

Tagged :

Evaluation of E-Learning Web Sites Using Fuzzy Axiomatic Design Based Approach

High quality web site has been generally recognized as a critical enabler to conduct online business. Numerous studies exist in the literature to measure the business performance in relation to web site quality. In this paper, an axiomatic design based approach for fuzzy group decision making is adopted to evaluate the quality of e-learning web sites. Another multi-criteria decision making technique, namely fuzzy TOPSIS, is applied in order to validate the outcome. The methodology proposed in this paper has the advantage of incorporating requirements and enabling reductions in the problem size, as compared to fuzzy TOPSIS. A case study focusing on Turkish e-learning websites is presented, and based on the empirical findings, managerial implications and recommendations for future research are offered.

Büyüközkan, G. and Arsenyan, J. and Ertek, G. (2010).“Evaluation of e-learning web sites using fuzzy axiomatic design based approach.” International Journal of Computational Intelligence Systems, 3 (1). pp. 28-42.

Note: This is the final draft version of this paper. Please cite this paper (or this final draft) as above.
Download
Evaluation of E-Learning Web Sites Using Fuzzy Axiomatic Design Based Approach

Dr. Gürdal Ertek recommends the following related books:


Models, Methods, Concepts & Applications of the Analytic Hierarchy Process (International Series in Operations Research & Management Science) Softcover reprint of the original 1st ed. 2001 Edition


The Hierarchon: A Dictionary of Hierarchies (Analytic Hierarchy Process, Vol 5)

 

 

 

Tagged :

Design requirements for a tendon rehabilitation robot: results from a survey of engineers and health professionals

Exoskeleton type finger rehabilitation robots are helpful in assisting the treatment of tendon injuries. A survey has been carried out with engineers and health professionals to further develop an existing finger exoskeleton prototype. The goal of the study is to better understand the relative importance of several design criteria through the analysis of survey results and to improve the finger exoskeleton accordingly. The survey questions with strong correlations are identifited and the preferences of the two respondent groups are statistically compared. The results of the statistical analysis are interpreted and insights obtained are used to guide the design process. The answers to the qualitative questions are also discussed together with their design implications. Finally, Quality Function Deployment (QFD) has been employed for visualizing these functional requirements in relation to the customer requirements.

Patoğlu, V., Ertek, G., Öz, O., Zoroğlu, D., and Kremer, G. (2010) “Design requirements for a tendon rehabilitation robot: results from a survey of engineers and health professionals.” In: ASME 2010 International Design Engineering Technical Conferences & Computers and Information in Engineering Conference (IDETC/CIE 2010), Montreal, Quebec, Canada

Note: This is the final draft version of this paper. Please cite this paper (or this final draft) as above.

Download
Design Requirements For A Tendon Rehabilitation Robot: Results From A Survey Of Engineers And Health Professionals

Dr. Gürdal Ertek recommends the following related books:

Engineering Design 5th Edition

 


Engineering Design: A Practical Guide

 

 

 

 

Tagged :

Çapraz sevkiyat için temel bilgiler

Çapraz sevkiyatta, kamyonlarla gelen malzemeler çıkış kapısına yönlendirilerek bekletilmeden doğrudan doğruya ya da kısa bir süreliğine bekletilerek sevkiyatı gerçekleştirecek kamyonlara yüklenir. Çapraz sevkiyat, lojistik süreçlerinde tasarruf elde etmek ve rekabetçi avantaj kazanmak için uygulanabilecek önemli bir tedarik zinciri stratejisidir. Örneğin, dünyanın en büyük perakendecisi olan Wal-Mart’ın lojistik başarısının temelinde çapraz sevkiyat ve bu stratejiyi gerçekleştirebilmek ve sürdürebilmek için kurulan sistem yatmaktadır. Bu makalede çapraz sevkiyat konusunda giriş seviyesinde bir bilgilendirme yapılacaktır: Çapraz sevkiyatın çeşitleri, ön koşulları, uygulandığı sektörler, getirdiği avantajlar ve dezavantajlar, ve perakende sektöründeki tipik bir çapraz sevkiyat süreci bu makalenin içeriğini oluşturmaktadır.

Ertek, G. (2010) “Çapraz sevkiyat için temel bilgiler” Lojistik, Sayı: 13.

Note: This is the final draft version of this paper. Please cite this paper (or this final draft) as above.

Download
Çapraz Sevkiyat İçin Temel Bilgiler

Dr. Gurdal Ertek’in onerdigi kitaplar:

World-Class Warehousing and Material Handling, Second Edition

Tagged :

Kimya Sanayinde Su Tasarrufu İçin Karar Destek Sistemi

Bu bildiride, Türkiye’nin sanayileşmiş bölgelerinden Gebze’de bulunan bir temizlik kimyasalları fabrikası için geliştirdiğimiz ve 7 ay boyunca kullanılarak test edilen bir Karar Destek Sistemi (KDS) tanıtılacak ve yapılan çalışma özetlenecektir. Üretim planlamadan sorumlu fabrika çalışanları bu yeni sistemi uygulamaya aldıktan sonra firma haftada 1 tona yaklaşan su tasarrufu sağlamıştır. Su tasarrufunun yanısıra maliyet, enerji ve işgücü kazançları da gözlemlenmiştir. Temizlik kimyasallarının üretiminin planlamasında faydası ve kullanılabilirliği kanıtlanan bu sistem, ürünlerarası geçişin ürün karakteristiklerine göre yıkama gerektirdiği boya, tekstil, gıda ve diğer kimya sanayilerinde de kullanılabilme potansiyeline sahiptir.

Ertek, G., Akçay, A.E. (2010) “Kimya Sanayinde Su Tasarrufu İçin Karar Destek Sistemi.” İ.T.Ü. 12. Endüstriyel Kirlenme Kontrolü Sempozyumu, 16-18 Haziran 2010, Istanbul, Türkiye

Note: This is the final draft version of this paper. Please cite this paper (or this final draft) as above.

Download

Kimya Sanayinde Su Tasarrufu İçin Karar Destek Sistemi

Dr. Gurdal Ertek’in onerdigi kitaplar:

Artificial Intelligence: A Modern Approach (3rd Edition) 3rd Edition

Network Flows: Theory, Algorithms, and Applications 1st Edition

 

 

 

Tagged : /

Innovation in product form and function: customer perception of their value

The goal of product design is to obtain the maximum effect with minimum cost in functionality and aesthetic beauty. Consumers are attracted to the designs that reflect their use behaviors and psychological responses more than they are to the simple visual representations. When product functions and qualities are similar across products, customers make their purchasing decision upon aesthetic form. Form presents a significant competitive factor that improves the value of a product. Overall, the purpose of this study is to examine the most important product design factors that affect the market share trends of mobile phone companies. Study uses product characteristics for 1,028 mobile phones released between 2003 and 2008 as a case study. The multiple linear regression analysis is used to select highly correlated variables that influence the market share, and Mallow’s Cp method is used to determine the best-fitting model. The Partial Regression Coefficients are used to evaluate the relative importance of design criteria. The nine mobile phone design features that affect the market share were identified, and the block form style is determined as the most important design factor. Using these approaches, this study demonstrates how investments should be directed in the next mobile phone design process.

Kim, T., Okudan, G. and Ertek, G. (2009) “Innovation in product form and function: customer perception of their value.” In: ASME 2009 International Design Engineering Technical Conferences & Computers and Information in Engineering Conference (IDETC/CIE 2009), San Diego, CA, USA

Note: This is the final draft version of this paper. Please cite this paper (or this final draft) as above.

Download
Innovation In Product Form And Function: Customer Perception Of Their Value

Dr. Gürdal Ertek recommends the following related books:


Engineering Design 5th Edition

 

 

 

 

 

 

 

 

 

 

 


Engineering Design: A Practical Guide

 

 

 

 

Tagged :

Visual Data Mining for Developing Competitive Strategies in Higher Education

Information visualization is the growing field of computer science that aims at visually mining data for knowledge discovery. In this paper, a data mining framework and a novel information visualization scheme is developed and applied to the domain of higher education. The presented framework consists of three main types of visual data analysis: Discovering general insights, carrying out competitive bench marking, and planning for High School Relationship Management (HSRM). In this paper the framework and the square tiles visualization scheme are described and an application at a private university in Turkey with the goal of attracting brightest students is demonstrated.

Ertek, G. (2009). “Visual Data Mining for Developing Competitive Strategies in Higher Education,” in Data Mining for Business Applications. Editors: Longbing Cao, Philip S. Yu, Chengqi Zhang and Huaifeng Zhang. Springer.

Note: This is the final draft version of this paper. Please cite this paper (or this final draft) as above.

IMPORTANT: Even though this draft erroneously shows the header “Chapter 1”, the final version appeared as “Chapter 18 – Visual Data Mining for Developing Competitive Strategies in Higher Education” in the book “Data Mining for Business Applications” edited by Longbing Cao, Philip S. Yu, Chengqi Zhang and Huaifeng Zhang, and published by Springer in 2009.

Download
Developing Competitive Strategies in Higher Education through Visual Data Mining

Dr. Gürdal Ertek recommends the following related books:


Data Mining for Business Applications 2009th Edition


The Craft of Information Visualization: Readings and Reflections (Interactive Technologies) 1st Edition

 

 

 

Tagged : /

An Open Source Java Code For Visualizing Supply Chain Problems

In this paper, we describe an open source Java class library for visualizing supply chain problems within a geographical context. The highly competitive markets and recent technological advances make the use of such supply chain network visualizations critical in both strategic and tactical levels. The most important characteristic of our work is its easy integration with any Java application. Our software differs from any other commercial and open source supply chain visualization tool by its simple structure, easy adoption and implementation and high compatibility. The main motivation of our study was to develop a simple – yet effective – library that would not require to learn and apply complicated visualization tools and data structures such as Geographical Information Systems (GIS). In this study, we illustrate the use of our visualization tool through maps of Turkey, Europe, North and South America, the United States and the NAFTA. We believe that ease of visualization offered by our open source tool will contribute to a multitude of projects in supply chain design, as well as increasing productive communication among practitioners, especially involved in strategic level decision making processes. We foresee that our supply chain visualization tool will fill a gap in this area with its simple but effective structure.

Yamaner, Y., Yamaner, Y., Akçay, A. E., Ertek, G. (2008) “An open source Java code for visualizing supply chain problems” . CELS 2008, Jönköping, Sweeden. (presented by Yekta Yamaner, Yalçın Yamaner and Alp Eren Akçay).

Note: This is the final draft version of this paper. Please cite this paper (or this final draft) as above.

Download
An Open Source Java Code For Visualizing Supply Chain Problems

Dr. Gürdal Ertek recommends the following related books:


An Introduction to Geographical Information Systems (4th Edition)

 

 

 

 

 

Tagged : /