As long as there are no changes to anything since the last run, you could certainly write it in to any production record as "No Change From Last Run" or "No Artwork Changes per customer". We use a master job card and actually have a box for "Repeat Job" and one for "Changes" and print Yes or NO in them when the card is created. Artwork changes go straight from the customer to our art dept. and from there a planning meeting is scheduled to cover any changes. For us (Food Contact Paperboard Packaging), we hold a planning meeting for every new and changed product. There is a set checklist that records all specifications and our planning team goes through it. It includes verification of contract signed, artwork approval and date accepted, paperboard type and gauge, die information, window material and size, ink type and colors, gluer assignment and special instructions and other customer spec's. They review all items and enter the correct information on a master sheet which is then scanned and saved in out system under the customer's name. The meetings take between 5 and 10 minutes as long as all members have gathered all the information they are responsible for before the meeting. Hope there's something there you can use. 
