Generally estimated using the unit construction project investment estimation method, unit physical engineering volume investment estimation method, the proposed budget index investment estimation method.
(1) unit construction project investment estimation method, calculated by multiplying the unit construction volume investment by the total amount of construction work. General industrial and civil buildings to unit construction area (square meters) of investment, industrial kiln masonry to unit volume (cubic meters) of investment, reservoirs to dams unit length (meters) of investment, railroad roadbed to unit length (kilometers) of investment, mine excavation to unit length (meters) of investment, multiplied by the corresponding construction volume of construction work to calculate the cost of construction work. This method can be further divided into unit function price method, unit area price method and unit volume price method.
1) unit function price method. This method utilizes cost-price per functional unit estimates, which will be selected for all such projects **** there are units, and calculate the quantity of that unit in each project. For example, the number of beds in a hospital can be used as the functional unit, and the cost of building a new hospital is broken down into the number of beds it provides. This calculation first gives the unit cost of each bed and then multiplies it by the number of beds in that hospital to determine the amount of that hospital project.
2) Price per unit area method. This method starts with dividing the known cost of construction work for the project by the total area of housing in the project, which is the price per unit area, and then applying the result to a future project in order to estimate the cost of construction work for the proposed project.
3) Unit volume price method. In some projects, the height of the floor is an important factor affecting the cost. For example, warehouses, industrial kilns masonry height according to the need will have a great deal of change, it is clear that this time is no longer applicable to the price per unit area, and the price per unit volume has become the applicable method of determining the preliminary estimate. The total construction cost of the completed project divided by the building volume, you can get the unit volume price.
(2) unit physical volume investment estimation method, to unit physical volume of investment multiplied by the total physical works. Earthwork investment per cubic meter, mine roadway lining project investment per linear meter, road surfacing project investment per square meter, multiplied by the corresponding total physical works to calculate the construction cost.
(3)Investment Estimation Method, there is no such estimation indicators and construction costs account for a large proportion of the total investment in the project, you can use the estimation method. The use of this method, should have a more detailed engineering information, construction information prices and engineering cost indicators, invested time and workload.