On Wed, 25 Feb 2015 18:21:06 +0000 (UTC), John McCoy
wrote:

Electric Comet wrote in news:mcl041$dn4$1
:

this is nothing to do with parts wearing out, this is about bad
engineering which includes bad choices for materials

As an engineer, I have to comment on this. It's not
"bad engineering". It's "cost engineering", which is
when management forces the engineers to design to a
predetermined cost. Engineers hate it, because it
forces you to design in all sorts of crap to meet an
unrealistic goal.

As an engineer, I'll have to disagree. Engineering is *all* about
cost. It's easy to build a bridge that will stand. It's really hard
to design one that will barely stand. The goals might be unrealistic
or perhaps the engineers aren't quite smart enough. ;-)