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Dive into the research topics where Hongsuk Yang is active.

Publication


Featured researches published by Hongsuk Yang.


International Journal of Production Research | 2014

Managerial capabilities of information technology and firm performance: role of e-procurement system type

Soojung Oh; Hongsuk Yang; Soo Wook Kim

Firms need to find a proper fit between their own information technology (IT) capabilities and IT systems in order to enhance performance. Thus, the purpose of this paper is to examine the moderating effect of certain e-procurement system types on the relationship between IT capabilities and firm performance. Moderated regression analysis is used to test for interaction effects of IT capabilities, including collaboration capability and dynamic capability, and e-procurement system types including, E-market and Extranet. Data of 142 Korean manufacturing firms are collected and used in the analysis. There is a stronger effect when relationships between IT capability and firm performance are considered with the involvement of other resource such as e-procurement system type. When e-procurement has a minimum-information sharing function and a high market-making function, collaboration capability had a greater contribution on financial performance. On the other hand, when an e-procurement system has limited search functions, the dynamic capability shows a greater contribution to financial performance. The result of this paper gives a strategic view by providing a new perspective regarding the suitability between e-procurement being used by itself and the IT capability necessary for this.


international conference on future generation information technology | 2009

Modeling and Simulation of Tandem Tollbooth Operations with Max-Algebra Approach

Young-Chae Hong; Dong-Kyu Kim; Seung-Young Kho; Soo Wook Kim; Hongsuk Yang

This study proposes a new model to simulate tandem tollbooth system in order to enhance planning and management of toll plaza facilities. A discrete-event stochastic microscopic simulation model is presented and developed to evaluate the operational performance of tandem tollbooth. Traffic behavior is represented using a set of mathematical and logical algorithms. Modified versions of Max-algebra approach are integrated into this new algorithm to simulate traffic operation at toll plazas. Computational results show that the benefit of tandem tollbooth depends on the number of serial tollbooth, service time and reaction time of drivers. The capacity of tandem tollbooth increases when service time follows a normal distribution rather than negative exponential distribution. Specifically, the lower variance of service time is, the better capacity tollbooth has. In addition, the ratio of drivers reaction time to service time affects the increasing ratio of the capacity extended by tollbooth.


Management Science and Financial Engineering | 2013

The Effect of Unobservable Efforts on Contractual Efficiency: Wholesale Contract vs. Revenue-Sharing Contract

Sungwook Kang; Hongsuk Yang

An interesting puzzle in business practices is that although many researchers emphasize the benefits of a revenue-sharing contract, a wholesale contract has remained to be the most common contractual form. By introducing the concept of unobservable efforts, we examine the contractual efficiency of a wholesale contract and a revenue-sharing contract. The multi-task agency model and experimental design approach are used to analyze the relationship between the contractual efficiency and parameters. A major finding of our study is that a wholesale contract coordinates unobservable efforts, while it fails to coordinate the order quantity decision. Because unobservable efforts have mixed effects on the contractual efficiency, the superiority of contract type depends on parameters. This finding implies that a wholesale contract can be a competitive contract, especially when unobservable efforts are heavily involved. Our conclusion is that the current popularity of a wholesale contract is manager’s rational response to complex supply chain environments rather than irrational behaviors.


Journal of the Korean operations research and management science society | 2012

Self-Service Model Considering Learning Effect : Self-Service Gas Station

Sung Wook Jung; Hongsuk Yang; Soo Wook Kim

In recent years, service delivery systems employing a self-service approach have been rapidly spreading. Since a self-service system provides a lower product price, it attracts more customers. However, some system managers are still hesitant to accept a self-service system, because there is no systematic model to predict its performance. Therefore, this research attempts to provide a systematic and quantitative model to predict the performance of a self-service system, focused specifically on a self-service gas station. Under this model, the traditional queuing theory was adopted to describe the general self-service process, but it is also assumed that some changes occur in both the customer arrival rate and the service performance rate. In particular, the price elasticity was introduced to capture the change in the customer arrival rate, and the existence of learning effect and helpers were assumed to design the changed service performance rate. Under these assumptions, a simulation model for a self-service gas station is established, and three performance measurements, such as average number of customers, average waiting time, and Utilization are observed, depending on the changes in price difference and helper-operating time. In this research, the optimal operation strategy for price differentiation and helper-operating time is proposed in accordance with the level of the customer learning rate. Although this research confines the scope of the study to the self-service gas station model, the results of this research can be applied to any type of self-service system.


Asian Journal on Quality | 2009

Models for Scheduling Individual Jet Aircraft

Hongsuk Yang

This paper considers the short term fleet scheduling problem as described by Keskinocak and Tayur (1998). Fleet scheduling may directly affect the service quality of fractional jet aircraft business. The contributions of this paper are two: (i) we show how their model is easily implemented in a standard modeling language, LINGO, and (ii) an alternate formulation is given which is expected to perform better on large, difficult problems.


European Journal of Operational Research | 2009

Conditions that cause risk pooling to increase inventory

Hongsuk Yang; Linus Schrage


International Journal of Hospitality Management | 2011

The effects of product diversification on firm performance and complementarities between products: a study of US casinos.

Kyung Ho Kang; Seoki Lee; Hongsuk Yang


Corporate Governance: An International Review | 2018

The effects of politically connected outside directors on firm performance: Evidence from Korean chaebol firms

Jae Yong Shin; Jeong-Hoon Hyun; Seungbin Oh; Hongsuk Yang


Archive | 2006

Quasi Random Sampling for Operations Management

Hongsuk Yang


The Korean Journal of Nutrition | 2018

Designing optimized food intake patterns for Korean adults using linear programming (I): analysis of data from the 2010~2014 Korea National Health and Nutrition Examination Survey

Kana Asano; Hongsuk Yang; Youngmi Lee; Jihyun Yoon

Collaboration


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Soo Wook Kim

College of Business Administration

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Changhee Kim

Seoul National University

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Dong-Kyu Kim

Seoul National University

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Jae Yong Shin

College of Business Administration

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Jihyun Yoon

Seoul National University

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Kana Asano

Seoul National University

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Seung-Young Kho

Seoul National University

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