Order Promising

Running Available to Promise as an Order Promising Discipline

A promise date is a financial commitment. Here is how a plant runs ATP so customer service quotes dates the building can actually hit, week after week.

Every promise date customer service quotes is a financial commitment made on the plant's behalf. A site taking 500 order lines a week that mispromises just 4 percent generates 20 recovery actions: expedited freight at 600 to 1,200 dollars a shipment, overtime pulls at 1.5 times labor, and late penalties that run 1 to 3 percent of PO value at large OEM customers. Worse, promise misses compound. One customer burned twice starts demanding 2 weeks of buffer on every order, which inflates your backlog and hides real capacity. ATP is the number that decides whether you sell inventory once or promise it twice, and plants that treat it casually pay for the same units two or three times.

The math is subtraction, and the discipline is in the inputs. Available to promise equals on-hand inventory plus scheduled receipts, minus firm sales allocations, minus safety stock, minus quality holds. Work an example: 2,400 units on hand, 1,200 arriving Thursday on a confirmed PO, 2,150 already allocated to firm orders, 300 held as safety stock, and 150 sitting on a quality hold. ATP is 2,400 plus 1,200 minus 2,150 minus 300 minus 150, which is 1,000 units you can promise without stealing from anyone. The Available to Promise calculator runs this in seconds, but the answer is only as good as the five inputs, and four of them decay daily.

Benchmark the inputs before you trust the output. Inventory record accuracy needs to sit at 98 percent or better by location, verified by cycle counts, or your on-hand number is fiction. Supplier receipt reliability should be 95 percent on-time within a 1-day window before you count scheduled receipts as promisable. Quality holds should age less than 48 hours before disposition. On the output side, track promise accuracy: world-class plants hit the originally quoted date 95 to 98 percent of the time, average plants run 80 to 88 percent, and anything below 75 percent means your ATP is decorative. Quote turnaround under 4 hours is a reasonable standard for make-to-stock lines.

Four levers move ATP reliability more than anything else. First, cycle counting: counting A items every 30 days and B items every 90 typically lifts record accuracy from 92 to 98 percent within two quarters. Second, allocation hygiene: purge canceled and expired orders weekly, because ghost allocations of even 3 to 5 percent of stock silently choke promisable quantity. Third, hold discipline: a standing rule that quality dispositions happen within 2 business days keeps held stock under 1 percent of inventory instead of the 4 to 6 percent that accumulates by default. Fourth, right-size safety stock quarterly against actual demand variability rather than a flat 2-week rule.

The failure modes repeat at every plant. Double promising is the classic: two reps quote the same 800 units to different customers because ATP lives in a spreadsheet refreshed nightly instead of decrementing in real time. Stale receipt dates are next; a supplier slips 5 days, nobody updates the PO, and 1,200 promised units simply do not arrive. Ghost allocations from canceled blanket orders can lock up 10 percent of stock for months. And the quiet killer is safety stock double counting, where planners promise into the buffer during a hot month, then discover in month two they have promised 300 units that were never for sale.

Run ATP on a cadence. Daily, hold a 15-minute promising huddle with customer service and planning: review yesterday's promise misses, orders quoted beyond standard lead time, and any hold aging past 48 hours. Weekly, publish a promise accuracy scorecard by product family, with reason codes on every miss; five weeks of codes will show you whether the problem is records, receipts, or allocation. Monthly, audit allocations against open orders line by line, recount safety stock parameters on the top 50 SKUs, and reconcile ATP output against three actual order promises picked at random. The audit takes 2 hours and routinely recovers 3 to 5 percent of promisable inventory.

World-class looks like this: 98 percent promise accuracy, OTIF at 97 or better, quote response under 1 hour, expedite freight below 0.5 percent of sales, and ATP recalculated with every MRP run instead of weekly. Get there and the commercial payoff is bigger than the cost savings. Sales can quote confidently against real availability, which typically converts 2 to 4 percent more orders in competitive quotes where response speed decides the win. The plant stops paying for the same unit twice, and planning stops burning 10 hours a week arbitrating fights over inventory that a clean number would have prevented.

Published 2026-07-02.