| Title |
Conceptual Cost Estimation Model Using by a Parametric Method for High-speed Railroad |
| Keywords |
conceptual estimate;regression;parametric;high-speed railroad;civil work;개략공사비;회귀분석;매개변수;고속철도;토공사 |
| Abstract |
There is currently applied to the unit cost per a distance (KRW/㎞) for estimating the conceptual cost of civil work on basic planning stage of high speed railroad. This unit cost is an arithmetic average value based on historical data, which could be in big error. It also is difficult to explain the deficiency comparing the estimated cost derived from next basic design stage. This study provides the conceptual estimation model using by the parametric method and regression analysis. Independent variables are the distance and the geological materials (earth, weathered rock, soft-rock, hard-rock), extracting from the actual data to 36 contracts. The deviation between the unit costs estimated using the developed model and the actual cost data is presented in the range from -0.4% to +31%. This range is acceptable compared the typical range “-30% to + 50%”. This model will improve the accuracy of existing method and be expected to contribute to effective total cost management and the economic aspects, reduce the financial expenditure. |