Transitioned Drawings - Significant Drawing Numbers

[moebius4]

1. Our Company has transitioned many TDP's from several companies. We always add a transition statement to the first sheet of each drawing and bump the revision letter.

2. We have some drawings from a particular company that used a significant drawing numbering and part numbering system.

3. Over 80% of their drawing numbers include the P/N dash number. ie. They used 12B040501-1001 as the drawing number for the Top Assembly and not just 12B040501; they then used 12B040501-2001 = Primary Sub-Assembly; 12B040501-2101 = Another Primary Sub-Assembly.

4. We are making design improvements that require us to roll a sub-assembly P/N and the top assembly P/N. ie. The new 12B040501-1003 consists of a revised 12B040501-2003 and an unchanged 12B040501-2101.

5. Since the orginal design activity used the P/N dash number as part of the drawing number, I've been asked to do the same thing.

Q1. Can I continue to use the other companies drawing numbering sequencing?
Q2. For the new drawings, I plan on using our DAI (CAGE CODE) and not theirs. Correct?

 

[3DDave]

A1) Sure. As long as you can keep them straight and you have no external customers to say otherwise.
A2) Sure. Unless you are selling the drawing package and the buyer requests their number be on the drawings.

I never did enjoy the significant number concept, but some find it helpful. A decent data management system makes up for quite a bit of what's lost with significance, particularly ensuring that numbers aren't duplicated.