With the widespread adoption of the EPC (Engineering, Procurement, Construction) turnkey contracting model, schedule?visa disputes in complex projects have become increasingly frequent. Based on a schedule?delay incident in a specific project—caused by delayed preliminary demolition—this paper adopts a whole?process consulting perspective and systematically investigates both the contractor’s delay claim rationality and the technical methods by which the whole?process consulting firm reviews and optimizes the project schedule. The study employs the Critical Path Method (CPM), schedule?compression techniques, and delay?interference analysis theory. Practice shows that accurately delineating changes in the critical path, scientifically compressing construction sequences, and identifying uncontrollable factors are the core elements of effective schedule?visa management.