Rutl, Rutk and Rutm were calculated to determine the unit costs in Bangalore based on the unit costs in Japan.
Rut can be calculated as follows.
Rutl = UCbl ÷ UCjl
Rutk = UCbk ÷ UCjk
Rutm = UCbm ÷ UCjm
We determine Rutl by comparing the average unit costs of labor in Japan and Bangalore as shown in Table 9.2.1-1.
To determine Rutk, it is possible to compare the costs of some types of machinery as shown in Table 9.2.1-7.In consideration of the fact that most large machines are imported as shown in Table 9.2.2-1, however, we set Rutk = 1.2, instead of using the data in Table 9.2.1-7, by assuming a 20% surcharge on cost in Japan (CIF cost for India).
To determine Rutm, Table 9.2.1-2 was used. In case of composite materials they were estimated based on the costs of component materials shown in Table 9.2.1-2, for example, considering the fact that PC concrete contains 300 k/m3 of steel reinforcing bars and stranded steel wires, and RC concrete contains 80 k/m3 of steel reinforcing bars. Tables 9.3.2-1 and 9.3.2-2 show quantities of component material required for each category of the structures.
(h) Based on unit costs in Japan, we estimate those in Bangalore (Cost bjt) or their components UCl, UCk and UCm by using Rutl, Rutk and Rutm. The Cost bjt provides the reviewed cost.
With the consideration on the productivity of labor, a labor input modification ratio, 4 should be multiplied to Rutl.
As a result, Cost bjt is calculated by the following formula.
Cost bjt = Cost jt x Rbl x 4 x Rutl + Cost jt x Rbk x Rutk + Cost jt x Rbm x Rutm
Cost bjt show Table 9.3.2-5, and 9.3.2-6.
(i) We evaluate Cost bt comparing with Cost bjt.
(2) Supports, Guideways, Stations and Other Structures
Tables 9.3.2-1 and 9.3.2-2 list quantities of different work categories, based on which we calculated Cost jt and Cost bjt following the procedures given in Table 9.3.2.1.
We adopted unchanged the costs calculated by UBTSL for special structures T, special structures (crossovers), improvement of station site preparation and environmental remediation, as the quantities of piece work were not known or their costs share a rather minor portion. We did not consider the costs of relocating utility facilities, as relevant data was not available.
As a result, the total cost is estimated at 272,332,000 US dollars, or 1.43 times the amount estimated by UBTSL (188,760,000 US dollars). See Table 9.3.2-7.
