The Estimate Lives In A Spreadsheet, The Schedule On A Whiteboard
You quoted the job six weeks ago in Excel, your superintendent runs the schedule off a whiteboard and text threads, and the change order someone signed in the field never made it into accounting. When the customer asks what the final number is, three people open three files. Contractors across the Valley live in exactly this mess, and it gets more expensive the more jurisdictions a job touches.
See How This Is Handled