I do so love it when Excel is used for electonics purposes. However in your case I see it was only a tool to support your insight.
I hope you don't mind if I subvert the thread and point your readers to my blogs on the use of Excel in electronics on Planet Analog. There are at least 4 more to come over the next 6 months. One is due out any day now.
As we unveil EE Times’ 2015 Silicon 60 list, journalist & Silicon 60 researcher Peter Clarke hosts a conversation on startups in the electronics industry. Panelists Dan Armbrust (investment firm Silicon Catalyst), Andrew Kau (venture capital firm Walden International), and Stan Boland (successful serial entrepreneur, former CEO of Neul, Icera) join in the live debate.