What to use for Initial Release designation...
What to use for Initial Release designation...
(OP)
Does anyone have the correct reference for what should be used on a drawing's initial release? Should it be a dash, meaning "original release" or should it be NC for "no change". I figure it would be in ASME Y14.25M but I don't have a copy of the spec handy. Thanks, ERC





RE: What to use for Initial Release designation...
In summary:
Do you mean ASME Y14.35M-1997 Revision of Engineering Drawings & Associated Documents? I don't see 14.25 listed in 14.100.
Are you talking about what should go in the description column of the rev history block?
I took a look at 14.35 and nothing jumped out at me, clarify the question and I'll look again.
Next time consider posting this type of question in:
Config control http://www.eng-tips.com/threadminder.cfm?pid=781 or drafting standards http://www.eng-tips.com/threadminder.cfm?pid=1103
KENAT, probably the least qualified checker you'll ever meet...
RE: What to use for Initial Release designation...
RE: What to use for Initial Release designation...
In section 5.1 (ASME Y14.35M-1997) Revision Letters "Upper case letters shall be used in sequence beginning with A and omitting letters I O Q S X & Z."
I'd suggest your current employer is correct.
I don't see mention of - or NC or N/C. I have seen - on old drawings from various places. I definitely wouldn't use N/C as / have been dropped from most of the standards now.
For prototype revs we actually use numbers and then go to letters at initial (formal) release. My understanding is the standard is only talking about formally released drawings.
KENAT, probably the least qualified checker you'll ever meet...
RE: What to use for Initial Release designation...
"Art without engineering is dreaming; Engineering without art is calculating."
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RE: What to use for Initial Release designation...
Nowadays, it isn't practical to have no letter assigned to the initial release, and I've never seen any modern examples of this.
Revision A is commonly used for initial production releases of drawing. Numeric revisions (starting with 1) are often used to preproduction or unofficial drawing releases. However, it appears the standard does still allow for the use of a dash for initial releases. However, given modern PLM's and other Change Control methods, it just isn't practical in many cases to use a dash, and it is very common to associate the initial release as being Revision A, at least in my experience.
Matt
CAD Engineer/ECN Analyst
Silicon Valley, CA
sw.fcsuper.com
Co-moderator of Solidworks Yahoo! Group
RE: What to use for Initial Release designation...
RE: What to use for Initial Release designation...
What isn't practical about it? I see plenty examples of initial release indicated as "-", or "nil", or simply leaving the revision box blank.
I also have a vendor that uses "FI" for "First Issue". This confuses a lot of people.
A former employer avoided the issue entirely by controlling via drawing "Issue" numbers. The first release of a drawing was "Issue 1". Made perfect sense.
RE: What to use for Initial Release designation...
I like the zero revision number for the original. When you see the number 1 in the REVISION block, it seems to indicate that there has been 1 revision and you'd wonder why you never got the original. A zero revision means that there have been no revisions - it's an orignal.
If you "heard" it on the internet, it's guilty until proven innocent. - DCS
RE: What to use for Initial Release designation...
"Art without engineering is dreaming; Engineering without art is calculating."
Have you read FAQ731-376: Eng-Tips.com Forum Policies to make the best use of Eng-Tips Forums?
RE: What to use for Initial Release designation...
From the looks of this thread, there are a multitude of ways depending on the company.
Jeff Mirisola, CSWP
http://designsmarter.typepad.com/jeffs_blog
Dell M90, Core2 Duo
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Nvidia 3500M
RE: What to use for Initial Release designation...
Here (US commercial) we kind of do the opposite, numbers for development (also no formal config control) letters for formally release documents and combination for drafts of next rev, eg the first draft of rev B would be B1.
At the end of the day the OP appears to be in aerospace in the US and working to ASME standards. While the standard does hint at - for first releases it only really details using letters.
fcsuper, well spotted on finding that reference to -, I missed it.
KENAT, probably the least qualified checker you'll ever meet...
RE: What to use for Initial Release designation...
RE: What to use for Initial Release designation...
Wes C.
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RE: What to use for Initial Release designation...
If a new project is started in an area of the plant for which a drawing exists (say Rev 1) and this drawing would be have to be revised, the proposed changes are 1A, 1B, etc. until issued for construction as Rev 2.
Personally, this makes a lot of sense to me. I always thought engineering contractors using letters for construction issues had it wrong. Guess we're the ones who have it backwards. Oh well, we've only been doing it this way for 100+ years (really).
Jerry Myers, P.E. (Chemical/Mechanical)
Senior Engineer