Comparison of Mobile Research Methods

I was going a bit crazy trying to remember (much less discuss with others) the advantages and disadvantages of various research methods for informing mobile device design. So I've put together a little chart describing them which shows advantages and disadvantages:
Comparison of Mobile Research Methods

While I was at it I got to thinking about how society interacts with technology and made a little diagram showing how people use affordances of technologies.

And then it occurred to me that these methods look at different time periods of usage to help inform the design of devices which (presumably) will be used in the future. So there's a diagram showing applicable timescales as well. All are on the same page.

Enjoy. Please send comments.