This is the last of my 5 part Evidence Based Network series where I start talking about WiFi network interference.
One of the most important points to take away is that timing is everything. You need to find a methodology that will capture when the interference is occurring.
Unfortunately when interference is misdiagnosed, you may inadvertently increase transmission levels, increasing noise levels.
WiFi interference can be caused by non 802.11 devices, or wireless devices, so having access to a spectrum analyzer is critical. The ability to leave a tool and get an alert when the noise occurs would be a HUGE bonus.