درروش مسير بحراني، ديرترين زماني است كه يك فعاليت ممكن است بر مبناي منطق شبكه زماني، تاريخ پايان پروژه و محدوديت‌هاي زماني تكميل شود مي‌شود. همچنین به تعاریف early finish date, early start date, late start date, و schedule network analysis مراجعه شود

In the critical path method, the latest possible point in time when the uncompleted portions ofa schedule activity can finish based on the schedule network logic, the project completion date, and any schedule constraints. See also early finish date, early start date, late start date, and schedule network analysis