PCB design and PCB layout design

I got really confused. What is the difference between PCB design and PCB layout design? I might be wrong but as far as my understanding goes, PCB layout design falls under PCB design process. I also think that PCB schematics building and PCB fabrication also falls under PCB design process. I would like to understand the differences, if any.

There is no differnce between pcb design and pcb layout design.Layout(out line, components placement and etches etc) involves in Pcb designing,therefore shortly it is called pcb designing.