I'd like to start with the fact that I am an RRM guy. I think Radio Resource Management does a pretty good job of managing TX Power and Channel selection when configured properly. I know that some people out there don't have confidence in RRM, just know that this reflects my opinion regarding the matter.
We covered TX power in part 2 of this series, now let's talk about Dynamic Channel Assignment (DCA). I can't tell you how many times I've been talking with a customer or fellow engineer and they tell me "DCA is broken," "DCA makes poor choices," or "DCA is making poor channel selection choice."
When I ask them to show me why they think this, they generally show me a map that has multiple APs in the hall and several of them are on the same channel and adjacent to each other. Much like the following:
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