Which method calculates available-to-promise using the most immediate uncommitted quantities?

Which method calculates available-to-promise using the most immediate uncommitted quantities?

• A. Cumulative Available-to-Promise
• B. Discrete Available-to-Promise
• C. Time Fencing
• D. Rough Cut Capacity Planning

Answer: (B)

The concept being tested is how ATP (available-to-promise) is calculated with respect to up-to-the-minute, uncommitted stock. Discrete ATP focuses on the most immediate uncommitted quantities for a specific date or order. It looks at the current on-hand inventory and the very latest uncommitted receipts or allocations that affect that short time window, and then subtracts what’s already promised to other orders. The result is a precise, up-to-date amount you can actually promise now, which makes it the most responsive method for immediate order promising.

In contrast, cumulative ATP sums up uncommitted quantities across a broader time horizon, which can include future receipts and allocations not yet ready to be released, making it less reflective of the exact, current availability for an imminent promise. Time fencing restricts changes to orders after certain dates, rather than computing ATP, and rough cut capacity planning is about matching overall capacity with demand in a rough way, not about fine-grained, current uncommitted stock for promises.