WiFi is a Utility, and Needs Capacity Planning
When is the last time you said: “Wow, this WiFi is great!”? You don’t really notice it when it works. You are more likely to say: “This WiFi is crap” when it doesn’t meet your expectations. WiFi is no longer a convenience, it’s an essential utility like electricity. You would like it work every time and without hesitation, like turning on a light.
Like the power grid, one of the biggest challenges in designing a wireless network is capacity planning. The goal of capacity planning is to determine how many access points are needed to provide a good user experience. Deploying too many APs is a waste of money and can make performance worse, but deploying too few will cause user experience problems (the equivalent of brownouts) when an AP becomes oversubscribed.