1. Lawson, R.M. and Ogden, R.G. Hybrid' light steel panel and modular systems", Thin-Walled Structures, 46(7-9), pp. 720-730 (2008). 2. Hong, S.-G., Cho, B.-H., Chung, K.S., and Moon, J.H. Behavior of framed modular building system with double skin steel panels", Journal of Construction Steel Research, 67(6), pp. 936-946 (2011). 3. Park, J.S. and Park, T.K. A study on modular construction method in military facilities", Proceedings of AIK Spring Conference, 01, pp. 565-570 (2006). 4. Ha, T.-H., Cho, B.-H., Kim, H., and Kim, D.-J. Development of an e_cient steel beam section for modular construction based on six-sigma", Advances in Materials Science and Engineering, Article ID 9687078, 13 pages (2016). 5. Pheng, L.S. and Hui, M.S. Implementing and applying six-sigma in construction", Journal of Construction Engineering and Management, ASCE, 130(4), pp. 482- 489 (2004). 6. Hassan, A., Siadat, A., Dantan, J.-Y., and Martin, P. Conceptual process lanning-an improvement approach using QFD, FMEA and ABC methods", Robotics and Computer-Integrated Manufacturing, 26(4), pp. 392-401 (2010). 7. Lawson, M., Ogden, R., and Goodier, C., Design in Modular Construction, CRC Press (2014).