ATP is calculated based on a material plan and does not consider changes made after plan execution. It adds planned supply from orders and receipts to on-hand inventory and subtracts committed demand from sales orders and planned production for each time period. Committed demand excludes forecasts and manual entries. The available quantity is not cumulative between periods. ATP provides the quantity available for each time period based on the material plan.

1. Available to Promise (ATP)

2. ATP ATP ATP ATP ATP ATP ATP ATP ATP ATP
• TP is based on a specific MPS, DRP or MRP plan and is non-
cumulative. Changes to on-hand quantities, scheduled receipts, and
demands made after the planning process is completed are not
reflected in ATP until the next time the material plan is executed.
• Note: Any ATP calculation done through Oracle Master
Scheduling/MRP and Oracle Supply Chain Planning does not consider
the ATP rules you define in Oracle Inventory. For instructions on
viewing or calculating ATP through Oracle Inventory, see

3. Calculating ATP
• Oracle Master Scheduling/MRP and Supply Chain Planning calculates
the ATP quantity of an item for each day of planned production by
adding planned production during the period (planned orders and
scheduled receipts) to the quantity on hand, and then subtracting all
committed demand for the period (sales orders, component demand
from planned orders, discrete jobs, and repetitive schedules).

4. Calculating ATP
• Note: Committed demand does not include forecasted demand or
manually entered master demand schedule entries. Also, the amount
available during each period is not cumulative. Oracle Master
Scheduling/MRP and Supply Chain Planning does not consider ATP
quantities from prior periods as supply in future periods.

5. ATP = Stock In Hand + Supply - Demand
• on hand = nettable quantity on hand
• supply = planned orders, scheduled receipts (purchase orders,
purchase requisitions, and discrete jobs), suggested repetitive
schedules
• demand = sales orders, component demand (from planned orders,
discrete jobs, and suggested repetitive schedules); excludes
forecasted demand or manual entries

6. Suppose you want to see the available to promise
information on item A for period 1. After running a
plan, you get the following information for item A:
Beginning
Inventory
Period 1 Period 2 Period 3 Period 4
Forecasts 20 40 40
Manual Entries 50 40 10
Sales Orders 40 20 50
Scheduled
Receipts
110 40 30 50
Planned Orders 20 50
Nettable On Hand 20
ATP 110 20 30 50
Table 1 - 51. MRP Plan for Item A (Page 1 of 1)