| # Lead-time offsetting For lead-time offsetting, three dates are important: Start Date The date that a production order is started, or the material of a purchase order is ordered. Finish Date The date that a production order is finished, or the material of a purchase order is received. Finish Date > Requirement Date The date that a specific material or item is required for an order. The required material/item can be ordered by means of a purchase order, or it can be the result of a production order. The requirement date of a material can equal the start date of a production order, or can be later than the start date. Sequence of orders, with start dates, finish date, and requirement dates During the order-planning run in Enterprise Planning, in the Generate Order Planning (cprrp1210m000) session, orders are planned backward based on the requirement date. On plan-item level, the default supply source and the sourcing strategies determine the type of order that is created: Production order, purchase order or distribution order. Related topics Calendars in Enterprise Planning Horizons and time fences Time Zones in Enterprise Planning |