Is There A Placeholder for the Original Request Date on a Work Order

Our production planners are often moving the dates around for our production schedule. In many instances, our manufacturing facilities believe an order was completed "on time", but this was only because the requested date was moved out.

We are trying to determine a method to keep the original request/start date in order to determine which orders are truly on time. I don't see a field in the F4801 table that would work, but I'm not that savvy with work orders.

Thanks in advance.