Standard ATP checkThe 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) Example Cumulative ATP (t) = the lowest value of:
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:
Enabling standard ATP checking To enable standard ATP checking, perform the following in the Items - Planning (cprpd1100m000) session:
Note The CTP horizon is defined in working days.
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