RoyJ wrote:
(top posting fixed)
Roger_N wrote:
I often see comments about "Reinventing the wheel" on replies to
questions about making something that is manufactured. One time I
asked about making something on the knifemaking newsgroup and got a
response about reinventing the wheel. What? Them guys make knives!
Like there is some kind of knife shortage?

What about all the new aluminum flashlights? Did Mag-Lite and
Brinkman waste their time reinventing the flashlight? Why does West
Coast Choppers waste their time reinventing the motorcycle. And then
there are ... wheels, you can buy all kinds of sporty wheels for
automobiles, those companies really are reinventing the wheel!

If it wasn't for "reinventing the wheel" we'd only have stone wheels
with one choice of tire for only one make and model of automobile. So
much for building a better mousetrap, why reinvent the mousetrap?

Don't get me wrong, these replies usually inform the OP of a product
like they are wanting to make, and often very helpful. But there are
new inventions and about everything else is "reinventing the wheel".
Reinventing the wheel give opportunity for improvment and variety.

rant_mode = off

:-)

RogerN
Appreciating those who build a better mousetrap!


I teach design classes to budding engineers. There is a gray middle
ground between sticking with the old proven design and going with the
'bleeding edge' technology. Trying to help program young brain cells to
make this distinction can cause gray hair!

In real world jobs, there is a real tendency to not make changes in
"what we did on the last project". The result is 30 year old technology
and getting your product kicked in the market place.

The other side of the coin is the engineer who gets a kick out of
implementing the latest and greatest technology. Or the one that refuses
to look for good ideas from past project, the NIH syndrome.

The best engineers and designers have a knack for picking out the key
design elements from old products, looking for better ideas in the
marketplace, and add in some internal inspiration to get to a much
better end result.

One of my groups did a small pump redesign: basic design cleanup, picked
some key elements from the bigger and more expensive brothers in the
product line, and then did some serious repackaging to get it to fit in
the smaller pump. Result was 60% reduction in mfg cost and 5x increase
in field reliability. All I could do was smile.


Deciding which elements of a design to keep as old tried-and-true, and
which elements to advance to the bleeding edge can be one of the
toughest (and potentially most value-added) parts of a design (or major
redesign).

I always worry about designs (even my own!) that are too much 'old
stuff' or too much 'new stuff'.

--

Tim Wescott
Wescott Design Services
http://www.wescottdesign.com

Do you need to implement control loops in software?
"Applied Control Theory for Embedded Systems" gives you just what it says.
See details at http://www.wescottdesign.com/actfes/actfes.html