Backlog

Running a Backlog Burn Down Campaign That Holds

An open backlog is a promise with interest accruing. This playbook covers net burn capacity math, aging benchmarks, the scrub that removes 10 to 20 percent of phantom demand, and the daily campaign cadence that holds the date.

An open backlog is a promise with interest accruing. Every day an order sits past due, you pay in expedite freight at 2 to 4 times standard, in customer penalty clauses that commonly run 1 to 2 percent of order value per week, and in the sales calls your best people spend apologizing instead of selling. The burn-down number, days to clear the backlog at net output, is the honest answer to the only question customers ask: when. A plant with 18,000 units past due and 600 units a day of true net capacity above current demand is 30 days from clean, and every promise made without that arithmetic is a guess that will cost credibility twice.

The math: backlog quantity divided by net daily output, adjusted for schedule allowance. Net daily output is the key term, meaning output available beyond incoming demand, not gross capacity. If the plant produces 2,400 units a day, new orders arrive at 2,100 a day, and 100 units of daily output are reserved for trials and maintenance windows, net burn capacity is 200 units a day. Against a 6,000 unit backlog, that is 30 days. The Backlog Burn Down calculator handles the division and the allowance; the discipline is refusing to count capacity twice. Plants that quote burn-down from gross output promise 3 days and deliver 30, because incoming demand eats 87 percent of the machine.

Calibrate the backlog itself before the burn rate. Past-due backlog above 5 percent of monthly shipments is a yellow flag; above 15 percent the schedule has lost meaning and customers know it. Healthy plants hold past-due under 2 percent and total backlog inside quoted lead time. Watch backlog aging like receivables: the bucket over 30 days past due should stay under 10 percent of past-due units, because old backlog often hides unbuildable orders, missing parts, credit holds, dead specs, that no amount of capacity will clear. A weekly aging report typically finds 10 to 20 percent of an old backlog needs a phone call or a cancellation, not a production slot.

Levers to raise net burn rate: first, scrub the backlog, canceling or re-dating the 10 to 20 percent that is not real demand, which shortens the burn-down without producing a unit. Second, buy temporary capacity deliberately: a weekend shift adds 10 to 15 percent weekly output, and pricing it against penalty clauses usually justifies 4 to 6 weekends. Third, sequence by margin and penalty, not order age alone; burning the backlog in first-in order when 20 percent of it carries contractual penalties is donating money. Fourth, protect the burn allowance: if the 200 unit daily burn capacity gets raided for hot new orders, the 30 day plan becomes 90 and nobody decided it on purpose.

The failure modes: overpromising the curve by assuming zero absenteeism, zero downtime, and record yield for 6 straight weeks; build the plan at demonstrated rates, roughly the trailing 8 week average, and let upside be a gift. Accepting new orders at standard lead time during the burn refills the tub as fast as it drains; quote extended lead times or premium pricing until past-due drops below 5 percent. Hiding the backlog in re-dated orders, where planners push due dates out so nothing shows past due; track total re-dates per week and treat a spike as the alarm it is. And celebrating unit counts while the oldest order ages another month, because averages forgive what customers do not.

Run the burn-down as a visible campaign. Daily: units burned versus plan on a wall chart, and any gap over 10 percent gets a reason and a same-day countermeasure, 15 minutes at the tier meeting. Twice weekly during the campaign: constraint output review, because the whole curve lives on one work center's uptime. Weekly: aging buckets, the re-date count, incoming order rate versus assumption, and a recut burn-down date communicated to sales; a plan revised weekly stays credible, while one revised monthly becomes fiction by week 2. Monthly, post-campaign: hold the standard at past-due under 2 percent and keep running the burn math, so the next backlog is caught at 5 days, not 30.

World-class backlog management is mostly the absence of drama: past-due under 2 percent of monthly shipments, no order aged beyond 30 days past due without an executive-visible reason, promise dates hit 98 percent of the time, and a standing burn-down calculation that turns red the week net capacity goes negative, not the quarter after. When a real disruption hits, a supplier fire or a 2 week outage, the plant publishes a dated recovery curve within 48 hours, sequenced by penalty and margin, staffed with priced overtime, and reviewed daily until clean. Customers forgive a miss with a credible date attached; they leave over silence and slipping guesses.

Published 2026-07-02.