I found How to Measure Anything pretty interesting in its thorough application of calibration and Fermi calculation to all sorts of problems, although I didn’t find the digressions into Excel very useful. Definitely recommended if you don’t already have the mental knack for Fermi stuff.
Douglas Hubbard writes on the topic of calibration as well. He focuses on RW application of this stuff, and calibration is clearly a part of that.
His 1st book: http://www.amazon.com/How-Measure-Anything-Intangibles-ebook/dp/B001BPE8ZQ/ref=sr_1_3?ie=UTF8&s=books&qid=1258133710&sr=8-3
His site: http://www.hubbardresearch.com/dotnetnuke/
I found How to Measure Anything pretty interesting in its thorough application of calibration and Fermi calculation to all sorts of problems, although I didn’t find the digressions into Excel very useful. Definitely recommended if you don’t already have the mental knack for Fermi stuff.