A Basic Study on Effective Adjustment Method for Construction Escalation/De-Escalation Price

건설공사 중 물가변동에 따른 효율적인 계약금액 조정에 관한 기초 연구

Abstract

The construction of a facility is an act whereby infrastructure such as roads and railways and other facilities such as housing and office spaces are constructed, and due to the characteristics of the relevant industry where such construction is carried out in a custom order method, it requires a long period of time mostly. While the construction is carried out over a long period of time, fluctuations in the price of raw materials required for the construction occur. Therefore, the cost of the construction also fluctuates inevitably. The fluctuation of the construction cost meshes closely with the profit of a constructor and the efficiency of government spending. Therefore, it is necessary to maintain the construction cost at a reasonable level by adjusting the construction cost rationally in order to secure the required construction quality and spend the budget efficiently. The buffer system for solving such problem is the contract amount adjustment system by fluctuations in prices (Escalation/De-Escalation). In this study, the method combining the escalation method based on the item adjustment method was suggested for an efficient contract amount adjustment method. In addition, it is proposed that there be an investigation and codification of matters not applied to government acts and regulations on contracts related to the adjustment of fluctuations in prices legally.

시설공사는 도로, 철도 등 기간시설과 주거, 사무 공간 등의 다양한 인프라를 구축하는 행위로써 주문제작방식으로 시행되는 산업의 특성 상 대부분 장기간이 소요된다. 장기간에 걸쳐 공사가 진행되는 동안 공사를 구성하는 원재료 가격이 등락이 발생한다. 따라서 공사비 등락 또한 필연적으로 발생하게 된다. 공사비의 등락은 곧 시공사의 이익 및 정부의 예산지출의 효율성에 민감하게 맞물린다. 따라서 요구되는 공사품질 확보와 효율적인 예산지출 위해서는 합리적으로 공사비를 조정하여 적정한 수준의 시공비가 유지되도록 해야 한다. 이러한 문제의 해결을 위한 완충제도가 물가변동으로 인한 계약금액 조정제도(Escalation/De-Escalation)이다. 본 연구에서는 효율적인 계약금액 조정방법의 제안을 위하여 품목조정방식을 기반으로 지수조정방법을 접목한 방법을 제안하였다. 또한, 물가변동 조정과 관련된 국가계약법령 및 계약예규에 반영되지 못한 사항들을 조사하여 법적으로 성문화하도록 제안하였다.

Fig. 1. Research Methodology

Fig. 2. Concept of adjustment by item adjustment rate(Kim, W.Y. & Kim, Y.J., 2008)

Fig. 3. Concept of adjustment by index adjustment rate (Kim, W.Y. & Kim, Y.J., 2008)

Table 1. Example of Item Adjustment Method and Index Adjustment Method

Table 2. Index Adjustment Method and Item Adjustment Method Comparison

Table 3. Existing Expenditure Item Group of Construction Cost and Suggested New Item Group.

Table 4. Example of Estimation of Material De/Escalation Rate in Suggested New Method

Table 5. The part that needs to be regulated regarding the adjustment of contract amount due to price de/escalation