| RRP run, an overview |  |
| If you simulate orders with the Generate Order Planning (cprrp1210m000) session, ERP LN carries out the following steps for the specified scenario and plan level. Determine the set of items to simulate Determine the planning sequence of the items Simulate the items one by one 1. Determine the set of items to simulate You can specify a range of items in the Generate Order Planning (cprrp1210m000) session. If you use the Generate Order Planning (Item) (cprrp1220m000) session you can specify a single item. You can make the item selection smaller by selecting the Run a Net Change Planning check box. For more information, refer to Net-change simulations. You can extend the item selection by selecting one or both of the following check boxes: Use Bottom-Up Item Selection Use Top-Down Item Selection For more information about these check boxes, refer to RRP run, item selection. 2. Determine the planning sequence of the items ERP LN sorts the items by order phase-number. This sequence ensures that the end products are planned before the components. For more information, refer to Planning sequence and phase numbers. ERP LN divides each group of items that have the same phase number in two sub-groups: The first sub-group contains all items that are used as a use-up material or an alternative material. The second sub-group contains the remaining items. Items that are defined as alternative materials must be planned first, to determine the ATP (available-to-promise) of these items. If the RRP run later decides to use a use-up material instead of a standard material, or if the RRP run uses an alternative material to cover for a shortage of the standard material, the first planning results for the alternative materials are no longer correct. In that case, ERP LN replans the alternative materials automatically. 3. Simulate the items one by one ERP LN plans each item in the order of phase number. See RRP run, basic calculation for one item Related topics Order planning, an overview RRP run, item selection RRP run, basic calculation for one item Planning sequence and phase numbers Net-change simulations Use-up materials and alternative materials in Enterprise Planning |