It can be done quickly to cover a large area economically.
The test helps to identify variability of subsoil profile and to locate soft pockets such as filled up ponds.
When DCPT is carried out close to a few boreholes, suitable corrections may be obtained for a particular site and the number of bore holes can be reduced.
Disadvantages :
The test is normally not suitable for cohesive soils or very loose cohesionless soils.
It is normally not possible to evaluate the mechanical properties of the soil at great depths when the fric+tion along the extension rod is significant.
Correlation with SPT
The resistance is correlated quantitatively to the standard penetration test value (N) by C.B.R.I. Roorkee as
is correlated quantitatively to the standard penetration test value (N) by C.B.R.I. Roorkee as 
= 1.5N for depths upto 4m and, 
= 1.75N for depths 4 to 9m. 
