Tuesday, 30 December 2014

Tolerances and complex problems

One of my favourite quotations gets a regular airing . . .  indeed much more regular than my blog posts have been recently.

"For every complex problem there is an answer that is clear, simple, and wrong."

Almost everyone laughs at that.  It sounds both incisive and frivolous at the same time.  I expect most people then dismiss it from their minds and would probably be delighted if they hear it again in a year or two without getting any more wisdom from it.

For me, after enjoying it and regularly using it while reviewing technical designs in a complex engineering environment it has taken on a extra layer of meaning.  It should be the motto of all practical engineers.  What most people don't realise is that the art of engineering is to make things that might be a little bit wrong but to ensure that they are right enough to function correctly.

Engineers call this 'tolerancing'.  Proper choice of tolerances in any design is the art of balancing performance against cost.  If you get the design too right you might not be able to afford to build it, or might not have enough time.

This is well illustrated by the old story about how to tell the difference between a scientist and an engineer. 

Stand them in opposing corners of a room, with an attractive member of the opposite sex naked (and presumably rather tolerant and open-minded) in the middle.  Tell them to approach that person by successively halving the distance between themselves and the object of their desire. Then wait.

The first one to leave the room will be the scientist, who has worked out that, in this way, you will never really get there. The engineer, however, has figured out that you will get close enough - for all practical purposes.

7 comments:

Dobbin said...

Good to see the blog back, it's been too long!

kold_kadavr_ flatliner said...

Doesn't matter whether you're an atheist, God'll still Divinely Judge you. You should've learned, brudda, instead of puttn yourself inside your own, lil world which you couldn't remove yourself from cuzza fundamentalist idealogy.

God gives U.S. free-will in our finite existence, thus, what we mortals do with it determines our destiny. Think about that.

God bless you

kold_kadavr_ flatliner said...

Doesn't matter whether you're an atheist, God'll still Divinely Judge you. You should've learned, brudda, instead of puttn yourself inside your own, lil world which you couldn't remove yourself from cuzza fundamentalist idealogy.

God gives U.S. free-will in our finite existence, thus, what we mortals do with it determines our destiny. Think about that.

God bless you

Anonymous said...

Satta Matka - SattaMatkaG.com

Satta Matka | satta matka result - SattaMatkaG.in


Satta Matka | satta matka result - SattaMatkaG.com

Kulbeer Brar said...

main Phir Bhi Tumko Chahunga Arijit Singh Lyrics
happy Mother's day 2017
Mother day Quotes
Mothers day poems
mothers day messages

Love Fist said...

Best Gadgets Online deals offers Gadgets review

Love Fist said...

20 New Whatsapp Tricks you shoul know