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ATP with No Backward/Forward Consumption, No Accumulation (Period ATP)

Periods 1 2 3 4 5 6 7 8
Total Supply 6 4 2 4 8 4 4 4
Total Demand 6 2 3 6 6 1 2 2
Projected QOH 0 2 1 (-1) 1 4 6 8
ATP 0 2 -1 -2 2 3 2 2
New Demand           2    
New ATP 0 2 -1 -2 2 1 2 2

Table 1 - 21. Period ATP (Page 1 of 1)

With period ATP, demand is subtracted from supply within each period; the result is available to promise. Excess supply or demand from one period has no impact on another period. No attempt is made to match up supply and demand across periods. In the example above, some periods have demand exceeding supply; the result is the negative ATP in periods 3 and 4. Without accumulation and backward consumption, the quantity of 2 remaining in period 2 is not used to meet the excess demand in period 3.

If we receive a new order for 2 with a shipment date in period 6, the ATP check would tell us that this is acceptable, as ATP for period 6 is 3. If we accept this order and recalculate ATP, demand for period 6 goes to 3 and ATP drops to 1.

See Also

ATP with Backward Consumption

ATP with Backward Consumption and Accumulation

ATP with Forward Consumption

ATP with Backward Consumption and Accumulation, Accumulation Window of 2 Days

Defining ATP Rules

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