To compute phase numbers for master-based planningLN bases the phase number for master planning on the following data: LN computes phase numbers for
In the master-planning process, an item that is not part of any plan unit is treated as a plan unit of its own. Criteria for phase numbers The phase numbers of the plan units must conform to the following criteria:
Note An item is controlled by central multicompany planning if the Central Multicompany Planning check box in the Items - Planning (cprpd1100m000) session has been selected. Moreover, there must be a central multicompany scenario that includes the companies involved. If you use the Compute Phase Numbers (cprpd6200m000) session to recompute phase numbers for central multicompany planning, you need to specify the multicompany scenario involved. Similar criteria apply to plan items without plan units except LN uses the phase number of the plan item instead of the phase number of the plan item's plan unit. Computation procedure The computation of the phase numbers is an iterative process. You can choose between two methods:
In a regenerative computation, every plan unit and every plan item without a plan unit initially gets phase number 0. LN then checks the plan units and plan items without a plan unit one by one and adjusts their phase numbers until the criteria for phase numbers are fully met. For information on the net-change computation, see Net-change phase number computation. Example Consider the following bill of critical materials with seven items: Items A_1 belongs to plan unit 1, B_2 belongs to plan unit 2, and so on. The computation yields the following result:
You can see the result of the computation in the Master Phase Number field in the Plan Unit (cprpd6100m000) session for plan units and in the Master Phase Number field in the Items - Planning (cprpd1100m000) session for plan items without plan unit. Note The phase number computation also checks for cycles in the bills of critical materials.
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