All items should be planned for, however, there is no reason to calculate a plan for an item unless there has been a change in the demand or supply pattern since the last time a plan was calculated.

If the user has entered a new sales order or changed an existing one, there is reason to recalculate the plan. Other reasons include a change in forecast or the desired safety stock quantity. Changing a bill of material by adding or removing a component would most likely indicate a change, but for the component item only.

For multiple locations, the assignment takes place at the level of item per location combination. If, for example, a sales order has been created at only one location, the program will assign the item at that specific location for planning.

The reason for selecting items for planning is a matter of system performance. If no change in an itemís demand-supply pattern has occurred, the planning system will not suggest any actions to be taken. Without the planning assignment, the system would have to perform the calculations for all items in order to find out what to plan for, and that would drain system resources.

The Planning Assignment table monitors demand and supply events and assigns the appropriate items for planning. The following events are monitored:

For these direct supply-demand displacements, the order tracking and action messaging system maintains the Planning Assignment table and states a planning reason as an action message.

The following changes in master data can also cause a planning imbalance:

In these cases, a new function, Planning Assignment Management, maintains the table and states the planning reason as Net Change.

The following changes do not cause a planning assignment:

When calculating an MPS or an MRP, the following restrictions apply:

See Also