We don't use them anymore. the change description in the ECN/ECO is sufficient. The drawing rev table refers to the ECN number.
Thanks for your reply Chris.
I believe a marker is required to indicate the drawing area/view where the change took place.
It's the same reasoning for when you add/modify data that remains: to locate the revision on the drawing.
Even though posting a drawing image here would aid the discussion, putting a qualifier on this as to what extent the removal was, opens the door for others to create other rationales.
It's not huge deal breaker either way, but I think it's best to stick with one methodology to keep deviations and variations from creeping in, at a minimum, for consistent presentation (especially for external customers).
Minimizes the conversations on the less consequential matters, too.
ASME's Y14.35 has a standard for revisions: The American Society of Mechanical Engineers , perhaps this will help.
Thanks Kevin for your very reasonably reply and the link as well.
I too agree with Kevin. We should strictly follow any one methodology which is convenient to us.
Its also depend on the company policy...or the documentation sytem adopted by company...
At the end final output with past records must be safe & easily available...