| Title |
An Analysis of Cost Reduction Potentials for Modular Housing from the Long-term Perspective |
| Authors |
Kim, Hu Yong ; Ryu, Kuk Mu ; Kim, Kyoon Tai ; Jun, Young Hun ; Kim, Yea Sang |
| DOI |
http://dx.doi.org/10.6106/KJCEM.2018.19.6.124 |
| Keywords |
Modular Housing ; Pareto Graph ; Reducing Construction Costs |
| Abstract |
Despite the many advantages of modular housing, low preference for modular housing for consumers who are familiar with RC structure leads to high construction cost of modular housing. The cost of modular buildings is about 130% of that of RC structures, so it is urgent to secure economical efficiency of modular buildings. Therefore, in this study, after calculating the savings amount of modular housing by type of construction work, economic analysis was conducted from a long - term perspective. In order to carry out the research, the authors compiled and analyzed the material cost, labor cost, and expenses incurred by each type of work by reclassifying the statement of the modular housing into the factory production and the site installation. After that, Pareto diagrams were created to find a core work that is included in the cost ratio of about 80%, and selected it as a cost reduction subject. Based on the assumption that the market size of domestic modular housing is similar to the level of modular advanced countries such as Japan and European countries, six cost reduction methods were set up that reflects the characteristics of the modular construction method and used for the expert interviews. Cost saving potentials in percentage from the interview were converted to the amount of savings that can be achieved by each type of method when applying the method. Finally, the findings of the study are expected to suggest long-term directions for technical development for modular construction and cost savings |