Development of a Web-Based Strategic Management Expert System
In this paper, we present the development of a Web-based expert system, StrategyAdvisor Cloud, to support strategic management decision-making. The system was…
Research · Practice · Education
Publications of Dr. Gürdal Ertek
An open research archive spanning data analytics, supply chains, operations research, information visualization and management.
76 publications2002–2023Five research areas
Research catalogue
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A Predictive Data Analytics Methodology for Online Food Delivery
Online food delivery (OFD) has become a popular and profitable e-business category due to the rising demand for online food delivery. People are increasingly…
A Data Analytics Methodology for Benchmarking of Sentiment Scoring Algorithms in the Analysis of Customer Reviews
Due to digitalization, there exists an increased amount of user-generated content on the Internet, where people express their opinions on various topics.…
Analytical Modeling and Empirical Analysis of Binary Options Strategies
This study analyzes binary option investment strategies by developing mathematical formalism and formulating analytical models. The binary outcome of binary…
Analyzing a Decade of Wind Turbine Accident News with Topic Modeling
Despite the significance and growth of wind energy as a major source of renewable energy, research on the risks of wind turbines in the form of accidents and…
A Scoring Approach for the Assessment of Study Skills and Learning Styles
This paper presents the application of a scoring method and algorithm, adapted from the domain of financial risk management, for the computer-based assessment…
Beyond the Pandemic: How can Private Universities Transform with Online Education
The recent developments, due to the COVID-19 pandemic, resulted in an unexpectedly sudden and complete shift to online education all around the world.…
Graph-Based Visualization of Stochastic Dominance in Statistical Comparisons
Özet Bu yazıda, ortalamaların istatistiksel karşılaştırmasını ve elde edilen stokastik baskınlığı temsil etmek, anlamak ve yorumlamak için bir grafik…
Mind the Perception Gap: An Integrative Performance Management Framework for Service Supply Chains
Download the full published paper from Emerald. Download the abstract & developed framework as pdf . Visit the website or the Research Gate page of the paper.…
Location-Based Pricing and Channel Selection in a Supply Chain: A Case Study from the Food Retail Industry
Download the final draft of this paper. Many retailers nowadays operate in an Internet-enabled dual-channel supply chain setting, referred to as “click and…
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…
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…
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…
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…
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…
Çapraz sevkiyat için temel bilgiler
Çapraz sevkiyatta, kamyonlarla gelen malzemeler çıkış kapısına yönlendirilerek bekletilmeden doğrudan doğruya ya da kısa bir süreliğine bekletilerek sevkiyatı…
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…
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…
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…
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…
The bullwhip effect in supply chain: Reflections after a decade
A decade has passed since the publication of the two seminal papers by Lee, Padmanabhan and Whang (1997) that describes the “bullwhip effect” in supply chains…
A taxonomy of logistics innovations
In this paper we present a taxonomy of supply chain and logistics innovations, which is based on an extensive literature survey. Our primary goal is to…
Benchmarking the Turkish Apparel Retail Industry Through Data Envelopment Analysis (DEA) and Data Visualization
This paper presents a bench marking study of the Turkish apparel retailing industry. We have applied the Data Envelopment Analysis (DEA) methodology to…
Teaching Warehousing Concepts through Interactive Animations and 3-D Models
Download Teaching Warehousing Concepts through Interactive Animations and 3-D Models Dr. Gürdal Ertek recommends the following related books: Facility…
Impact of Cross Aisles in a Rectangular Warehouse: A Computational Study
Order picking is typically the most costly operation in a warehouse and traveling is typically the most time consuming task within order picking. In this…
Visual Mining of Science Citation Data for Benchmarking Scientific and Technological Competitiveness of World Countries
In this paper we present a study where we visually analyzed science citation data to investigate the competitiveness of world countries in selected categories…
A Data Mining Framework for the Analysis of Patient Arrivals into Healthcare Centers
We present a data mining framework that can be applied for analyzing patient arrivals into healthcare centers. The sequentially applied methods are…
Wind Turbine Accidents: A Data Mining Study
Download this paper. While the global production of wind energy is increasing, there exists a significant gap in the academic and practice literature…
Data Mining of Project Management Data: An Analysis of Applied Research Studies
Data collected and generated through and posterior to projects, such as data residing in project management software and post-project review documents, can be…
New knowledge in strategic management through visually mining semantic networks
Download the final draft of this paper. Today’s highly competitive business world requires that managers be able to make fast and accurate strategic…
Depolama Sistemleri
Depolar, ürünlerin dağıtımı sırasında kullanılan geçici stok noktalarıdır. Depolar, tedarik zincirlerinin hedeflenen amaçlar doğrultusunda çalışmasına ve…
Text Mining Analysis of Wind Turbine Accidents: An Ontology-Based Framework
As the global energy demand is increasing, the share of renewable energy and specifically wind energy in the supply is growing. While vast literature exists…
A Framework for Mining RFID Data From Schedule-Based Systems
Download this paper. A schedule-based system is a system that operates on or contains within a schedule of events and breaks at particular time intervals.…
Graph-based analysis of resource dependencies in project networks
It is a challenge to visualize high dimensional data such as project data to yield new and interesting types of insights. To address this, we augment the…
Profit Estimation Error Analysis in Recommender Systems
It is a challenge to estimate expected benefits from recommender systems based on association rule mining. This paper aims to address this challenge and…
Perception Gap and its Impact on Supply Chain Performance
Download this paper. The main purpose of this paper is to frame the perception differences between the buyer and supplier on the supply chain’s operational…
Competitiveness of Top 100 U.S. Universities: A Benchmark Study Using Data Envelopment Analysis (DEA) and Information Visualization
This study presents a comprehensive benchmarking study of the top 100 U.S. Universities. The methodologies used to come up with insights into the domain are…
Modelling the Supply Chain Perception Gaps
This study applies the research of perception gap analysis to supply chain integration and develops a generic model, the 3-Level Gaps Model, with the goal of…
Industrial Benchmarking through Information Visualization and Data Envelopment Analysis: A New Framework
We present a benchmarking study on the companies in the Turkish food industry based on their financial data. Our aim is to develop a comprehensive…
Rule Based Expert Systems for Supporting University Students
There are more than 15 million college students in the US alone. Academic advising for courses and scholarships is typically performed by human advisors,…
Optimizing the electric charge station network of ESARJ
In this study, we adopt the classic capacitated p-median location model for the solution of a network design problem, in the domain of electric charge station…
Risk Factors and Identifiers for Alzheimer’s Disease: A Data Mining Analysis
The topic of this paper is the Alzheimer’s Disease (AD), with the goal being the analysis of risk factors and identifying tests that can help diagnose AD.…
Fuzzy Bi-Objective Preventive Health Care Network Design
Download the final draft of this paper. Preventive health care is unlike health care for acute ailments, as people are less alert to their unknown medical…
Competitive Pattern-Based Strategies under Complexity: The Case of Turkish Managers
This paper aims to augment current Enterprise Architecture (EA) frameworks to become pattern-based. The main motivation behind pattern-based EA is the support…
Text Mining with RapidMiner
The goal of this chapter is to introduce the text mining capabilities of RAPIDMINER through a use case. The use case involves mining reviews for hotels at…
Linking Behavioral Patterns to Personal Attributes through Data Re-Mining
A fundamental challenge in behavioral informatics is the development of methodologies and systems that can achieve its goals and tasks, including behavior…
Statistical Scoring Algorithm for Learning and Study Skills
This study examines the study skills and the learning styles of university students by using scoring method. The study investigates whether the study skills…
Scoring and Predicting Risk Preferences
This study presents a methodology to determine risk scores of individuals, for a given financial risk preference survey. To this end, we use a…
Learning and Personal Attributes of University Students in Predicting and Classifying the Learning Styles
Download this paper. Developing effective study skills and learning habits is very important for university students, not only for getting a university degree…
Lojistik Bilişim Sistemleri
Bilişim Sistemleri , verinin toplanması, işlenmesi, depolanması ve bilgisayar ağları üzerinden istenen bir uca güvenli bir şekilde iletilerek kullanıcıların…
Insights into the Efficiencies of On-Shore Wind Turbines: A Data-Centric Analysis
Literature on renewable energy alternative of wind turbines does not include a multidimensional benchmarking studythat can help investment decisions as well…
Lojistik Bilisim Sistemleri Için Bir Sınıflandırma (Taksonomi)
Lojistik Bilisim Sistemleri - Bilişim Sistemleri , donanım, yazılım ve iletişim teknolojilerini bütünleştiren ve verinin toplanması, işlenmesi, depolanması ve…
Encapsulating And Representing The Knowledge On The Evolution Of An Engineering System
This paper proposes a cross-disciplinary methodology for a fundamental question in product development: How can the innovation patterns during the evolution…
Re-Mining Association Mining Results through Visualization, Data Envelopment Analysis, and Decision Trees
Re-mining is a general framework which suggests the execution of additional data mining steps based on the results of an original data mining process. This…
A taxonomy of supply chain innovations
In this paper, a taxonomy of supply chain and logistics innovations was developed and presented. The taxonomy was based on an extensive literature survey of…
Re-Mining Item Associations: Methodology and A Case Study in Apparel Retailing
Association mining is the conventional data mining technique for analyzing market basket data and it reveals the positive and negative associations between…
Actionable Insights Through Association Mining of Exchange Rates: A Case Study
Association mining is the methodology within data mining that researches associations among the elements of a given set, based on how they appear together in…
A Framework for Automated Association Mining Over Multiple Databases
Literature on association mining, the data mining methodology that investigates associations between items, has primarily focused on efficiently mining larger…
Assessing the Adverse Effects of Interbank Funds on Bank Efficiency Through Using Semiparametric and Nonparametric Methods
This chapter investigates the relationship between interbank funds and efficiencies for the commercial banks operating in Turkey between 2001 and 2006. Data…
Re-mining Positive and Negative Association Mining Results
Positive and negative association mining are well-known and extensively studied data mining techniques to analyze market basket data. Efficient algorithms…
A New Network Flow Model for Determining the Assortment of Roll Types in Packaging Industry
This paper reports work motivated by a real world assortment problem in packaging industry. A novel network flow model has been developed to solve the problem…
Financial Benchmarking of Transportation Companies in the New York Stock Exchange (NYSE) Through Data Envelopment Analysis (DEA) and Visualization
In this paper, we present a benchmarking study of industrial transportation companies traded in the New York Stock Exchange (NYSE). There are two…
DEA-Based Benchmarking Models in Supply Chain Management: An Application-Oriented Literature Review
Data Envelopment Analysis (DEA) is a mathematical methodology for benchmarking a group of entities in a group. The inputs of a DEA model are the resources…
Optimizing Waste Collection in an Organized Industrial Region: A Case Study
In this paper we present a case study which involves the design of a supply chain network for industrial waste collection. The problem is to transport metal…
A Framework for Visualizing Association Mining Results
Download > ertek_demiriz_iscis2006 Association mining is one of the most used data mining techniques due to interpretable and actionable results. In this…
Application of the Analytic Hierarchy Process (AHP) for Selection of Forecasting Software
In this paper, we described an application of the Analytic Hierarchy Process (AHP) for the ranking and selection of forecasting software. AHP is a…
Decision Support For Packing In Warehouses
Packing problems deal with loading of a set of items (objects) into a set of boxes (containers) in order to optimize a performance criterion under various…
Spreadsheet Optimization of Flow for WIP Goods at a Yarn and Tire Cord Manufacturer: A Case Study
We developed a spreadsheet optimization model to find the optimal material handling policy at a leading yarn and tire cord manufacturer’s facility. The focus…
Development of an Interactive Simulation of Steel Cord Manufacturing for Industrial Engineering Education
We developed an interactive simulation program to be used in industrial engineering education, based on an earlier simulation study of a steel cord…
Application of the Cutting Stock Problem to a Construction Company: A Case Study
This paper presents an application of the well-known cutting stock problem to a construction firm. The goal of the 1Dimensional (1D) cutting stock problem is…
Application of Local Search Methods for Solving a Quadratic Assignment Problem: A Case Study
Download > ertek_et_al_cie2005 This paper discusses the design and application of local search methods to a real-life application at a steel cord…
A Tutorial on Crossdocking
In crossdocking, the inbound materials coming in trucks to the crossdock facility are directed to outbound doors and are directly loaded into trucks that will…
Visual and Analytical Mining of Sales Transaction Data for Production Planning and Marketing
Recent developments in information technology paved the way for the collection of large amounts of data pertaining to various aspects of an enterprise. The…
Simulation Modeling for Quality and Productivity in Steel Cord Manufacturing
We describe the application of simulation modeling to estimate and improve quality and productivity performance of a steel cord manufacturing system. We…
Supplier and Buyer Driven Channels in a Two-Stage Supply Chain
We explore the impact of power structure on price, sensitivity of market price, and profits in a two-stage supply chain with single product, supplier and…
Demonstrating Warehousing Concepts Through Interactive Animations
In this paper, we report development of interactive computer animations to demonstrate warehousing concepts, providing a virtual environment for learning.…