The goal of an RF site survey is to gather enough information and data to determine the number and placement of access points that will provide the coverage required. Coverage required usually means the support of a minimum data rate in a given area. An RF site survey will also detect the presence of radio interference coming from other sources that could degrade the performance of the wireless LAN.
The need and complexity of an RF site survey will vary depending on the size of the facility and the work that is to be accomplished. A site survey is a good idea for the use of any wireless device because without a survey, users could end up with inadequate coverage and suffer from low performance in some areas.
As a result, one should have an RF site survey performed to understand fully the behavior of radio waves within a facility before installing any wireless devices. The deliverable would be a site survey report.