Question: Which short description should I use when dimensions are not modified, but just moved or relocated in a drawing?Īnswer: I've seen drawings that showed the last 10 revision letters with a short explanation of what it meant. Question: When a new revision is made, am I supposed to delete the old rev symbols? Say it’s rev C and I still have the rev a & b symbols on the drawing to show where the changes were made?Īnswer: It is fine to leave several prior revisions along with the associated changes on the drawing so that people holding an older product know what it means. Then it could be filled in as part of a later version of the BOM. You can avoid confusion for the reader by listing item 3 and having an obvious place holder dash in the BOM. You could have item 1, item 2, and item 4. Question: Do the revised standards of engineer drawings allow skipping item numbers in a bill of material?Īnswer: Yes. Long answer: all document pages should refer to the same revision letter and version number so that people who are looking at a set of drawings know that they belong together. Question: If I have a multi-page page document and rev sheet 1 and 4, do I update rev of all?Īnswer: Short answer: yes, at least the title block.
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