A long-lead model forecast has to be rechecked once it changes. Change review means going back over the production schedule, the shipping window, and the order lock rate, not just reading one line in the change request. Where experience from short-lead models was used to estimate a long-lead project, the responsibility split should rest on contract milestones and handover evidence rather than an early conclusion. The change can be handled together with the upstream steps in this import order check guide. The closeout spot check on a long-lead model forecast should confirm that vehicle, documents, costs, and customer communication are all closed against one another.