How it works
A wireless site survey connects the intended use of a network with measurements and installation constraints. It considers where users need coverage, what devices they use, nearby radio activity and routes for access-point cabling. A predictive plan and measurements taken on site provide different kinds of evidence and should not be confused.
Important differences and limits
A strong signal reading does not guarantee adequate capacity or reliable roaming. Wall materials, occupancy, interference and simultaneous users affect performance. A single test next to the router says little about a terrace or another floor. Results should be tied to the client device, band and conditions used during measurement.
A useful practical check
Start with a floor plan and the tasks that must work in each area. Measure signal and real data performance at useful locations, including busy or difficult areas. Record access-point settings and test devices. Repeat key checks after installation so the finished network is verified rather than merely matching a prediction.
An example in practice
For example, a laptop speed test at an empty desk cannot fully represent a busy meeting with several video calls. Include the expected device types and realistic use. The survey’s value is connecting measurements to the actual task, not simply producing a colourful report. Document limitations and untested areas explicitly; an incomplete measurement should not be presented as proof of coverage everywhere.