1. School of Business Administration Sogang University, Seoul, Korea
2. Software Engineering Research Group (SERG) Knowledge Economy Research Alliance and Faculty of Computing Universiti Teknologi Malaysia Johor, Malaysia + Department of Computer Engineering Yeungnam University, Gyeongsan, Korea
3. Software Engineering Research Group (SERG) Knowledge Economy Research Alliance and Faculty of Computing Universiti Teknologi Malaysia Johor, Malaysia
4. Department of Computer Engineering Yeungnam University, Gyeongsan, Korea