What do you call your first revision?
What do you call your first revision?
(OP)
Looking for some ideas.. when you all first create a drawing, do you start with a revision (1, or A, for example)? If so, what do you call that revision--what do you put in the revision text? Until now we've used "Breakdown Release" but we're considering changing that, and I'd like to get some alternative ideas. Thanks,
Brian
Brian





RE: What do you call your first revision?
RE: What do you call your first revision?
RE: What do you call your first revision?
Chris
Sr. Mechanical Designer, CAD
SolidWorks 2005 SP0.1
RE: What do you call your first revision?
Thanks for the quick reply...
Brian
RE: What do you call your first revision?
RE: What do you call your first revision?
RE: What do you call your first revision?
Chris
Sr. Mechanical Designer, CAD
SolidWorks 2005 SP0.1
RE: What do you call your first revision?
I prefer systems that use an "Issue" level rather than a "Revision" level.
The first time a drawing is released it is at Issue 1. Make changes and release, Issue 2. It's so simple.
RE: What do you call your first revision?
You are correct that "X" is never allowed, nor is I, O, S, or Q because each letter could look like a 1, 0, 5, or 0 depending on the font used.
But, and I'm going to reference DOD-STD-100 because I don't have the latest ASME equivalent in front of me, for the initial drawing release, there needs not be any information in the revision block, although most places add a rev "NEW" or "-" or "N/C" for no change there. The first change is denoted with an "A." Initial releases should not start with an A.
But, for parts that have not yet been production baselined (and this deals with configuration management and since CMII is out that no longer follows a MIL-Spec, this is now covered in the current ASME specs), a revision of X0 for initial "prototype" released followed by XA, XB, XC, etc. Once the part has been baselined for production, the revisoin goes to a "-" and the revision history is maintained in the rev block.
I believe this information is covered in the appendices of ASME specs because the are carry overs of the DOD- and MIL-STD. Commercial practices may not have this info defined, but it is useful and beneficial.
--Scott
For some pleasure reading, try FAQ731-376
RE: What do you call your first revision?
All preliminary dwgs prior to release are numerical rev's "1,2,3...".
Chris
Sr. Mechanical Designer, CAD
SolidWorks 2005 SP0.1
RE: What do you call your first revision?
"I think there is a world market for maybe five computers."
Thomas Watson, chairman of IBM, 1943.
Have you read FAQ731-376 to make the best use of Eng-Tips Forums?
RE: What do you call your first revision?
Places I've worked that used "-" tended to go away from it after a while; I don't remember the arguments or reasons. Also, it's good practice to avoid the letters I, O, Q, X and Z due to confusion with numbers, each other and just good practice to avoid "X" as a revision designator (IMO).
RE: What do you call your first revision?
In looking at the various responses, it occurs to me that "-" (or somesuch) for new formal releases makes better sense than "A" IMO. In addition, using a blank for formal release is undesirable because it could be assumed to be an error of omission.
RE: What do you call your first revision?
We maintain a system of experimental numbers for prototype parts. You pretty much have a free hand in how you use them and you don't have to be as picky with the notes, tolerances, gdt and all that just to make one part. When the part is ready for release, it gets a regular part number and gets brough up to the company drawing standards.
RE: What do you call your first revision?
RE: What do you call your first revision?
Chris
Sr. Mechanical Designer, CAD
SolidWorks 05 SP2.0 / PDMWorks 05
ctopher's home site
FAQ371-376
FAQ559-1100
FAQ559-1091
FAQ559-716
RE: What do you call your first revision?
Example: if we revise a design three times and the third time is exactly what we want, the drawing is released as Rev B (first was "-", then "A" then "B"). After are approvals are signed off the drawings go right into production via release, no further drawing time is required.
Fill what's empty. Empty what's full. And scratch where it itches.
RE: What do you call your first revision?
We commonly track revisions through the design stage with simply the date. Once a print is finally approved, it is released to production as a "Basic" print with no revision ( - ). Changes made after the part is in production are revisions (A, B, etc.) that result in notations in the title block.
Good luck controlling the revisions once you decide which protocol to follow!
Karman
RE: What do you call your first revision?
Place the circled revision symbol next to the item that you are revising so that it is easier to follow.
If you are making alot of changes to an electronic cad file then you can "X" out the sheet and state that in the upper right hand corner "Deleted Sheet" with the date.
After making the correction then you can Add a sheet by placing "Added Sheet" with the date.
Use alpha characters for sheet numbers.
Example:
Sheet 5
R1 Deleted Sheet 20APR05
Sheet 5A
R1 Added Sheet 20APR05
I hope this helps.
Regards,
Namdac
RE: What do you call your first revision?
I have to say, that is a first for me. I have never seen that revision process anywhere. Interesting. Thanks for your input.
Chris
Sr. Mechanical Designer, CAD
SolidWorks 05 SP2.0 / PDMWorks 05
ctopher's home site
FAQ371-376
FAQ559-1100
FAQ559-1091
FAQ559-716
RE: What do you call your first revision?
RE: What do you call your first revision?
Engr Sketches: part nos have an SK prefix with no rev control.
Developement Drawings: SK prefix is removed and dwg then assumes Rev. 1. Dwg is now under ECO control but does not require Config Control Board signatures to make changes.
Production Dwawings: Drawing assumes Rev. - and comes under full rev control with CCB signatures required.
Tunalover
RE: What do you call your first revision?
P# - PRELIMINARY
AS THE REV BEFORE THE DESIGN BECOMES APPROVED (I HAVE SEEN SOME PROJECTS WHO'S P'S GO INTO THE 3 DIGITS - LET ME KNOW IF ANYONE HAS SEEN A 4 DIG P RELEASE), THEN
NC - RELEASE FOR MANUFACTURE
AFTER THAT EACH REV IS ALPHABETICAL. AND REF'S AN ECO.
A - REF ECO #ECO NUM GOES HERE#
THIS SEEMS TO BE THE COMMON PRACTICE IN THE AEROSPACE N-DUSTRY.
GOOD LUCK TO YOU.
RE: What do you call your first revision?
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David Baird
mrbaird@hotmail.com
Sr Controls Designer
EET degree.
Journeyman Electrician.