FPGA & ASIC based design

The main diferrence between ASIC and FPGA based design is in the Back-end.
In FPGAs there is not much activities in back end.

FPGA flow:
SPECIFICATION -> RTL DESIGN -> FUNCTIONAL SIMULATION -> SYNTHESIS -> TRANSLATION -> MAPPING -> PLACE & ROUTE -> BITGEN GENERATION -> DOWNLOAD TO THE CHIP.

ASIC flow:
SPECIFICATION -> RTL DESIGN -> FUNCTIONAL SIMULATION -> SYNTHESIS -> EXTRACT RC VALUES -> DRC, LVS,etc., -> LIBRARY VENDOR SPECIFIC FILE FORMAT