"Don Pearce" wrote in message
...
On 27 Jul 2006 07:17:43 -0700, "Andy Evans"
wrote:

You make one change and measure - if it is better,
go a bit further until you peak. Then you start on the next parameter
and do it again. Once everything is as good as it gets, you go back to
the beginning and start again because everything interacts. Some
parameters you adjust in pairs because the interaction is first order
A bit like amplifier development in some ways.

This is a succinct, informative and practical explanation of product
development, and it sounds a hell of a lot like amplifier development
to me. You obviously have the benefit of experience here - from what
you say a lot of your work was extremely practical and solution
orientated in nature (and include the hard climates and adverse
circumstances.....!!!) Andy.

Yup that was way back when. It was all a bit more demanding than
amplifier development though. I was designing microwave and RF
measuring instruments for Marconi Instruments. The requirements were
many tens of dBs better than anything audio demands. The iterative
process was frequently something like 10 micron increments in the
length of a track connecting a FET gate. I would build a bunch at once
with all the different lengths, then evaluate them.

d

Don.
Do you know a guy called Peter Spurr from your Macaroni Inst days ??

Arfa