Re: Tolerance in text

Subject: Re: Tolerance in text
From: "Gene Kim-Eng" <techwr -at- genek -dot- com>
To: "TECHWR-L" <techwr-l -at- lists -dot- techwr-l -dot- com>
Date: Wed, 22 Feb 2006 20:26:04 -0800

Having spent some 15 years in naval and aerospace design during the
70's and 80's, I can attest to the fact that there are design standards for
both military and civilian shipbuilding that spell out in no uncertain terms
allowable dimensional tolerances. US military blueprints, for example,
use ASME Y14.100-200, other industries apply ANSI, ISO, DIN,
JIS or other standards. All it takes is a single note stating that drawings
are prepared "in accordance with" a standard to automatically apply all
of its tolerance requirements to every dimension in the drawing, "unless
otherwise specified" (and in such cases the standard will specify *how*
you are supposed to otherwise specify). You certainly cannot take a
dimension from someone else's email and "imply" a tolerance such as
"25 mm actually means 25 mm + 0.49 mm / - 0.50 mm" without knowing
what drafting standard is in use, or you end up with incidents like
Challenger or Hubble.

Gene Kim-Eng

----- Original Message ----- From: "Geoff Lane" <geoff -at- gjctech -dot- co -dot- uk>

FWIW, I have to disagree with your disagreement. My disagreement comes
from decades on the "shop floor" in a variety of disciplines (and
another couple of decades writing about it) -- not from a theoretical
standpoint. If you're building a ship 254 ft long, the actual finished
length is permitted to be no less than 253 ft 6 in and must be less
than 254 foot 6 in. The naval architect doesn't need to write the
tolerance because *in that industry* the implied tolerance is


WebWorks ePublisher Pro for Word features support for every major Help
format plus PDF, HTML and more. Flexible, precise, and efficient content delivery. Try it today!.
Doc-To-Help includes a one-click RoboHelp project converter. It's that easy. Watch the demo at

You are currently subscribed to TECHWR-L as archive -at- infoinfocus -dot- com -dot-
To unsubscribe send a blank email to techwr-l-unsubscribe -at- lists -dot- techwr-l -dot- com
or visit

To subscribe, send a blank email to techwr-l-join -at- lists -dot- techwr-l -dot- com

Send administrative questions to lisa -at- techwr-l -dot- com -dot- Visit for more resources and info.


RE: Tolerance in text: From: Jonathan West
Re: Tolerance in text: From: Geoff Lane

Previous by Author: Re: CareerBuilder web site
Next by Author: Re: Tolerance in text
Previous by Thread: Re: Tolerance in text
Next by Thread: RE: Tolerance in text

What this post helpful? Share it with friends and colleagues:

Sponsored Ads