How do you calculate backlog burn-down time?

Divide open backlog by net good output rate for the base days, then multiply by one plus the recovery allowance. With 2,500 units at 420 good units/day and a 15% allowance, base time is about 5.95 days and estimated recovery is about 6.85 days.

Why add a recovery schedule allowance?

Catching up rarely runs at theoretical rate, changeovers, expedites, and competing priorities slow it down. The 15% allowance here turns a 5.95-day base into a more honest 6.85-day estimate, so the recovery date you promise actually holds.

Should I use gross or net good output rate?

Always net good output. The backlog is cleared only by good, shippable units. Using a gross rate that includes scrap will make the burn-down look faster than reality and cause you to miss the recovery date.

What if the backlog keeps growing while I burn it down?

This calculation assumes a fixed backlog. If new demand still flows in, your effective burn-down rate is net output minus new demand. You must either add capacity above incoming demand or the 6.85-day estimate will keep sliding.

How do I burn down a backlog faster?

Raise net good output rate, through overtime, an added shift, or yield improvement, or reduce the backlog by renegotiating or outsourcing part of it. Doubling output to 840 good units/day would roughly halve the 6.85-day recovery estimate.

What is a reasonable recovery schedule allowance?

It depends on how much catch-up friction you expect. 10-20% is typical for a backlog cleared on existing equipment; the 15% used here is a sensible default. Use a higher allowance if recovery competes with normal production for the same line.

ERP & MRP Planning calculator

Backlog Burn Down Calculator

Backlog burn-down time estimates how many days it will take to clear an open order backlog at your current net good output rate, with a realistic allowance for the friction of catching up. It is the number a plant manager gives when a customer asks when they will be caught up, and it turns a scary backlog quantity into a concrete recovery date. Production control and operations teams use it to decide whether overtime, an extra shift, or outsourcing is needed to recover on time. A burn-down based on gross output rather than net good output is exactly how recovery dates slip.

What this calculator does

Estimate days needed to clear open backlog from backlog quantity, net daily output, and schedule allowance.
a production planner needs to estimate when open backlog can be cleared
It divides open backlog by net good output rate for a base recovery time, then inflates it by a recovery schedule allowance to account for catch-up friction.

Formula used

Base backlog burn-down time = open backlog quantity ÷ net good output rate
Estimated backlog recovery time = base time × (1 + recovery schedule allowance)

Inputs explained

Open backlog quantity:
Net good output rate:
Recovery schedule allowance:

How to use the result

Use it when a backlog opens up and you need a credible recovery date, or to test whether added capacity will clear it in time.
It assumes a steady net output rate and a single allowance factor, it will understate recovery if the backlog keeps growing from new demand or if output rate falls during the catch-up.

Current U.S. benchmarks

Manufacturing hourly earnings average $30.35 (BLS, Jul 2026), up 4.2% from a year earlier. Median machinist pay is $28.24/hr (OEWS 2025), with state medians on each state page. Manufacturers have 481k open positions nationally (BLS JOLTS).
U.S. manufacturing runs at 76.0% of capacity (Federal Reserve, Jul 2026). New factory orders are up 7.4% year over year (Census).

Common questions

How do you calculate backlog burn-down time? Divide open backlog by net good output rate for the base days, then multiply by one plus the recovery allowance. With 2,500 units at 420 good units/day and a 15% allowance, base time is about 5.95 days and estimated recovery is about 6.85 days.
Why add a recovery schedule allowance? Catching up rarely runs at theoretical rate, changeovers, expedites, and competing priorities slow it down. The 15% allowance here turns a 5.95-day base into a more honest 6.85-day estimate, so the recovery date you promise actually holds.
Should I use gross or net good output rate? Always net good output. The backlog is cleared only by good, shippable units. Using a gross rate that includes scrap will make the burn-down look faster than reality and cause you to miss the recovery date.
What if the backlog keeps growing while I burn it down? This calculation assumes a fixed backlog. If new demand still flows in, your effective burn-down rate is net output minus new demand. You must either add capacity above incoming demand or the 6.85-day estimate will keep sliding.
How do I burn down a backlog faster? Raise net good output rate, through overtime, an added shift, or yield improvement, or reduce the backlog by renegotiating or outsourcing part of it. Doubling output to 840 good units/day would roughly halve the 6.85-day recovery estimate.

Last reviewed 2026-07-13.