| # Net-change phase number computation The value of the Run Type field in the Compute Phase Numbers (cprpd6200m000) session determines whether a regenerative computation or a net-change computation is carried out. In a regenerative computation, each plan item's phase number is recomputed. In a net-change computation, not every plan item is recomputed. A net-change computation uses the following fields in the Items - Planning (cprpd1100m000) session: Master Phase Number Parent Order Phase Number Parent When a new BOM line, BCM line, or supplying relationship is generated, ERP Enterprise automatically updates these fields with the phase number of the plan item's parent. When you carry out a net-change computation, ERP Enterprise compares the plan item's current phase number with the parent phase numbers stored in the Items - Planning (cprpd1100m000) session. A plan item's phase number is recomputed only if the plan item's current phase number is less than or equal to the parent phase number. Related topics Planning sequence and phase numbers To recompute phase numbers To compute phase numbers for master-based planning To compute phase numbers for order-based planning |