Does the scheduled build date represent the date that a car was actually assembled?
The best answer to this question is "usually not". Many factors could cause a discrepancy between a scheduled build date and an actual assembly date, such as shortages of parts, worker strikes, and any number of other things. From what we've seen, the actual assembly date tends to differ from the scheduled build date. As an example, we know that the scheduled build date for the start of 1969 model year production at the Dearborn, Metuchen, and San Jose assembly plants was "04G", or July 4, 1968.