[londons_explore]

How fast do the WiFi signal strength maps get out of date?

Just someone changing the angle of an antenna or shifting a pile of stock near the router has to have a pretty big impact on signal strength.

And obviously a WiFi system upgrade where all the Mac addresses change must be a fairly big change and effectively gives a full service outage for all the users till you remap.

[AndrewHart]

We've had the solution live in stores for years without any issue. Our algorithms can clean up and filter out unreliable data, based on all of the other data we have, from other APs, from previous data etc..

If they re-fit the WiFi, which they might spend a month doing once every 5-10 years, it would need a re-survey, which could take 1-2 hours. But thankfully no new infrastructure.