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Differences between Planning Optimization and the deprecated master planning engine

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Planning Optimization results (including planned orders, quantities, and dates) might differ from results from the deprecated master planning engine. The differences can be caused by pending features. This article lists differences between Planning Optimization and the deprecated master planning engine that aren't listed on the Planning Optimization fit analysis page.

Feature How Planning Optimization differs from deprecated master planning
Forecasts for today's date Planning Optimization doesn't consider forecasts for today's date, though they were considered by the deprecated master planning engine.
Catch weight products Catch-weight products are considered usual products. Planned orders don't include a value for the catch-weight requirement quantity.
Forecast reduction for invoiced and delivered sales orders When a master plan has a demand forecast set up to reduce forecasts by transactions, deprecated master planning reduces the forecast by invoiced and delivered sales orders but Planning Optimization doesn't.

For example, suppose you have forecast for 100 ea of an item, and there exists a purchase order for 10 ea, and a sales order with 5 ea delivered and 2 ea invoiced. The deprecated planning engine would apply forecast reduction to create a planned order for 100 − 10 − 2 − 5 = 83 ea. However, Planning Optimization wouldn't consider the invoiced or delivered quantities, so it would order 100 − 10 = 90 ea. Therefore, Planning Optimization would suggest that you order supply for quantities that have already been delivered and/or invoiced, which might result in oversupplying.
Filtered production runs For details, see Production planning - Filters.
Forecast planning Forecast planning isn't supported. We recommend that you use master planning where a forecast model is assigned to the master plan.
Number sequences for planned orders Number sequences for planned orders aren't supported. Planned order numbers are generated on the service side. The planned order number is normally shown with 10 digits, but the sequence is actually built on 20 characters, with 10 digits allocated for the planning run count and the other 10 digits for the planned orders count.
Plan copy, plan delete, and plan version cleanup

The following items are disabled under Master planning > Master planning > Maintain plans in the navigation pane:

  • Plan copy
  • Delete plan
  • Plan version cleanup
Plan version cleanup is automatic with Planning Optimization, so you don't need to do it manually.
Return orders Return orders aren't considered.
Scheduling related features For details, see Scheduling with infinite capacity.
Safety stock fulfillment Planning Optimization always uses the Today's date + procurement time option for the Fulfill minimum field on the Item coverage page. This helps to prevent unwanted planned orders and other issues because if the procurement time isn't included for safety stock, planned orders that are created for low on-hand inventory would always be delayed because of the lead time. For more information, see Safety stock fulfillment with the deprecated master planning engine.
Safety stock pegging and net requirements The Safety stock requirement type isn't included and isn't displayed on the Net requirements page. Safety stock doesn't represent demand and doesn't have a requirement date associated with it. Instead, it sets a constraint on how much inventory must be present at all times. However, the Minimum field value is still taken into account when calculating planned orders during master planning. We suggest that you inspect the Accumulated quantity column on the Net requirements page to see that this value was considered. Because the pegging is different, different actions may be suggested. For more information, see Safety stock fulfillment with the deprecated master planning engine.
Transport calendars The value in the Transport calendar column on the Modes of delivery page is ignored.
Min/max coverage code with no values With the deprecated master planning engine, when you use a min/max coverage code where no minimum or maximum values are set, the planning engine treats the coverage code as a requirement and creates one order for each requirement. With Planning Optimization, the system creates one order per day to cover the full amount for that day.
Net requirements and manually created planned orders With the deprecated master planning engine, manually created supply orders for an item automatically appear among the net requirements for that item. For example, when creating a purchase order from a sales order, the purchase order appears on the Net requirements page without requiring any prior actions. This is because the deprecated master planning engine logs inventory transactions in the inventLogTTS table and shows changes on the Net requirements page for dynamic plans. However, with Planning Optimization, manually created orders won't appear among the net requirements of an item until Planning Optimization is run (using a plan that includes the item), or until you select Update > Master planning on the Action Pane on the Net requirements page, which will run master planning for the item. For more information about how to work with the Net requirements page, see Net requirements and pegging information.
Net requirements and any changes to supply or demand With the deprecated master planning engine, any changes to supply or demand for an item automatically appear among the net requirements for that item. For example, when increasing the quantity of a planned order, the purchase order appears on the Net requirements page without requiring any prior actions. This is because the deprecated master planning engine logs inventory transactions in the inventLogTTS table and shows changes on the Net requirements page for dynamic plans. However, with Planning Optimization, any changes won't appear among the net requirements of an item until Planning Optimization is run (using a plan that includes the item), or until you select Update > Master planning on the Action Pane on the Net requirements page, which will run master planning for the item. For more information about how to work with the Net requirements page, see Net requirements and pegging information.
Resource assignment When working with infinite capacity, the deprecated master planning engine assigns all planned orders to the same resource on a given resource group. Planning Optimization improves on this by selecting resources at random so different production orders can use different resources. If you want to use the same resource for all planned orders, then you must specify that resource in the route.
Extended data types (EDTs) Planning Optimization doesn't support changes to the precision of EDTs. This means this process isn't officially supported and isn't guaranteed to work.
Safety stock fulfillment Planning Optimization always uses a Fulfill minimum of Today's date + procurement time. This prepares the system to use a simplified planning setup in the future, and provides an actionable result. If the procurement time isn't included for safety stock, planned orders that are created for low on-hand inventory will always be delayed because of the lead time. This behavior can cause significant noise and unwanted planned orders. The best practice is to change the setting to use Today's date + procurement time. Update master data to avoid warnings. For more information, see Safety stock fulfillment with the deprecated master planning engine.
Copy static to dynamic plan Planning Optimization doesn't copy static plans to dynamic plans, regardless of the setting on the Master planning parameters page. In general, this operation is less relevant because of the speed and complete regeneration that Planning Optimization provides. If two or more plans are used, master planning should be triggered for each plan.
Negative days Planning Optimization always uses dynamic negative days, regardless of the setting of Use dynamic negative days on the Master planning parameters. The Use dynamic negative days setting on the Master planning parameters page has no effect on this behavior. For more information on negative days, see Delay tolerance (negative days)
Planned orders in the past Planning Optimization never plans orders in the past, regardless of the Requested date setting. If you do set a Requested date that's in the past, the system will keep your setting, but will set the Required date to Today.
Dimension-based configuration Planning Optimization doesn't support dimension-based configured products. Planning Optimization won't explode bills of material for these products.
Definition/meaning of safety stock

In Planning Optimization, safety stock isn't actual demand. For each coverage group, you can specify how strictly the system should peg safety stock as demand against the planned order that's created for it. (For more information, see Safety stock pegging options.) Coverage groups that use strict safety stock pegging work just like all groups in the deprecated engine where the Fulfill minimum field is set to Today's date + procurement time.

In the deprecated master planning engine, safety stock is demand, the same as other demand types. You can specify when safety stock will be fulfilled.
When safety stock is fulfilled

In Planning Optimization, safety stock is always fulfilled on today's date + procurement time, regardless of the item coverage setting.

In the deprecated master planning engine, item coverage settings include a Fulfill minimum field that defines when the safety stock must be fulfilled. (For more information, see Safety stock fulfillment with the deprecated master planning engine.)

Additional resources