Standard ATP check

The most straightforward way to check ATP for an ordered item is a check on the expected free inventory of the item on the sales order line itself.

LN calculates a cumulative ATP quantity for the finished good that takes all future actual demand and (planned) supply transactions into account. The ATP check on date (t) is performed against the cumulative ATP on (t). The cumulative ATP is the expected free stock.

LN calculates the cumulative ATP as follows:

Projected inventory (t) = inventory + actual and planned supply
		until (t) - actual and planned demand (t)

Note: If multisite functionality is active, the standard ATP check is performed per planning cluster.

Example

Cumulative ATP (t) = the lowest value of:

Projected Inventory (t), and
Cumulative ATP (t + 1)

Note (t + 1) indicates the day after day t

Example

Cumulative ATP constantly increases: if the cumulative ATP on t is 10 pieces, the ATP will be 10 or more on t+1.

Nonconsumed forecast demand is not part of cumulative ATP. Therefore, ATP is built up by (planned) supply for nonconsumed forecast demand.

The cumulative ATP quantity is displayed in these sessions:

Item Master Plan (cprmp2101m000)
Only for items that have a master plan
Item Order Plan (cprrp0520m000)
For items without a master plan

Enabling standard ATP checking

To enable standard ATP checking, perform the following in the Items - Planning (cprpd1100m000) session:

Select the Online ATP Update in EP check box to enable online updates after sales order entry.
Set the CTP Horizon field to a value greater than zero. LN assumes that an infinite supply is available after the CTP horizon. As a result, only orders with a delivery date before the CTP horizon will be checked.

Note: The CTP horizon is defined in working days.