Most of the posts above state that the SOP should be a very detailed document, and I agree with that as well, but I also like the comments made about being concise. There is a difference between being detailed and concise vs. detailed and redundant. I would also like to add to this conversation by discussing the correlation between how detailed an SOP is vs. how often it needs to be updated/revised. I think that the more detail that is included in the SOP will also result in having to update the procedure more often, because every little change to the procedure will require an update to the SOP. This is not necessarily a bad thing, but I think companies should make sure they account for this and have the appropriate resources to handle all of the SOP updates.