In most WLAN design tools, after defining project parameters or during the project creation wizard,...

Importing a scaled floor plan is one of the very first steps required in wireless design tools. This serves as the canvas upon which walls, attenuation, and APs will be layered. Without a floor plan, no spatial or RF modeling can occur.

From CWDP-305:

“A properly scaled and oriented floor plan is the foundation of a design. It should be imported early in the process before defining wall types, coverage areas, or AP placements.”

— Reference: CWDP-305 Official Study and Reference Guide, Chapter on Wireless Design Process