vlsi design flow chart

VLSI circuit designed by cmos technology I have some experience with verilog and FPGA
whenever we start designing we need to check product before sending it to fabrication there are some tool that can check and verify it ( simulator) verification give answer that it is possible to make physical hardware according to your choice or not

what is different level of designing in VLSI flow chart
can anyone explain little bit about vlsi design flow chart

Behavioural design in vlsi
structural design in vlsi
physical design in vls