Drafting
Menu | Engineering,
Design and Drafting Store
Products
and Services Directory
There are two common methods of indicating
where a revision has changed a drawing that contains a
system diagram. The first is the cloud method, where each
change is enclosed by a hand-drawn cloud shape, as shown in
the illustration below - left. The second method involves
placing a circle (or triangle or other shape) with the
revision number next to each effected portion of the
drawing, as shown in the illustration below. The cloud
method indicates changes from the most recent revision only,
whereas the second method indicates all revisions to the
drawing because all of the previous revision circles remain
on the drawing.
The revision number and revision block are
especially useful in researching the evolution of a specific
system or component through the comparison of the various
revisions.
|
