| # Maintain master plan If you select the Maintain Master Plan field in the Items - Planning (cprpd1100m000) session, LN maintains an item master plan and possibly also channel master plans for the plan item. The maintenance of item master plans and channel master plans requires storing a lot of data. If many plan items have master plans, the online update of master plans takes considerable system performance. For each transaction, such as the generation of an order or the issue of goods, LN must immediately update all fields of the master plan over the entire master-planning horizon. Examples of these fields are the projected inventory, ATP, and cumulative ATP. If many plan items have master plans, the Initialize, Roll, and Update Scenario (cprpd4200m000) session takes a lot of system performance to roll or initialize a scenario. The following situations can be reasons to maintain an item master plan: You need to create a demand forecast for the plan item. The production of the item is a bottleneck in the factory. The item is situated on the customer order decoupling point, that is, the item is produced on the last large stock point in the production process or logistical process. For other plan items, you do not need a master plan. Note LN can calculate a plan item's available-to-promise (ATP) quantity or the capable-to-promise quantity without a master plan. You do not require a master plan for that purpose. Recommendation: Unless you really require the functionality, clear the Maintain Master Plan field. Performance aspects Effect on CPU: Yes Effect on database growth: Yes Related topics To use master plans Items - Planning |