I am trying to understand what I can use for the first & last furnishing date as an engineering firm. We work across most of the states, and I want to understand what date I need to Put into Levelset to begin tracking my noticies. We sign a contract with our customer and may not begin on draws for 2-3 weeks or 4-5 months. Do I use the contract date or the time we begin working on the drawings/measurements? In regards to the last furnishing date, is it the day we give the final documents to the customer? Do i update the date if they send up a revision order?