What the Recalculate Process Does

This table shows you how the Recalculate process affects your constrained supply plan when you make changes.

If you change:	The Recalculate process:
A demand date or quantity, or add a demand Note: You can perform this change only on end demands, but not dependent demands.	Updates the projected available balance of the item. Updates a subset of the order attributes of the demand: Suggested Due Date, Order Quantity, Days Late and Quantity by Due Date. Doesn't generate any new supplies in response to a demand increase or a new demand.
The supply due date or quantity for a planned order or existing supply Note: For existing supplies, such as work orders, you can only set the firm quantity to 0. You can't set the firm quantity value lower or higher than the original supply quantity.	Updates the projected available balance of the item and the items for which this supply generates dependent demands. Updates a subset of the order attributes of the supply including Suggested Due Date, Compression days, Days Late, Reschedule Days and others. Updates a subset of the order attributes of the demands pegged to this supply: Days Late, Quantity by Due Date, Material Available Date. Recalculates the resource requirement dates and hours based on updated supply dates and quantities. Recalculates the Consumption Start date attribute and the Material Available date attribute of the pegged supplies one level up and down. Recalculates the dependent demand dates and quantities based on updated supply dates and quantities. Doesn't generate any new supplies in response to new or increased quantities of the dependent demands resulting from this supply change.
Add a supply or change the work definition of an existing planned order	Updates the projected available balance of the item and the items for which the supply generates dependent demands. Calculates the key order attributes for the new supply. Calculates new resource requirements for the order if this is a make order. Calculates new dependent demands for the order. All dependent demands are placed on the start date of the order and not on operation start date. Doesn't generate any new supplies in response to new or increased quantities of the dependent demands resulting from this supply change.
Add or modify the resource availability	Recalculates these measures: Net Resource Availability Cumulative Net Resource Availability Resource Availability Resource Utilization Percentage Supplies won't be rescheduled in or out in response to the change in resource availability.
Add or modify supplier capacity	Recalculates these measures: Net Supplier Capacity Availability Supplier Capacity Availability Supplier Capacity Utilization Percentage Supplies won't be rescheduled in or out in response to the change in supplier capacity.
Reschedule a resource activity using the Gantt Chart	Assumes that if a resource activity is moved in or moved out by a certain number of days, that the parent supply is also moved in or out by the same number of days. Based on this assumption, the same recalculation logic that's applied to the action of moving a supply is also applied in this case.
Choose an alternate resource for a resource requirement	Updates the original resource requirement with the new resource. Calculates the resource hours for the newly-selected resource based on work definition specifications. Equally apportions the calculated resource hours across the time buckets that are included in the make span of the original resource requirement. Updates the resource-related planning measures, such as resource requirements and resource utilization percentage, for the old and the new resource. The planning process assumes that the old and new source have approximately the same processing rates.
Choose a substitute component for a planned order	Updates the dependent demand for the original component to a quantity of 0. Inserts a new dependent demand for the substitute component. Updates the supply, demand, and projected available balance measures for the old and the new components.