ERP & MRP Planning calculator

Backlog Burn Down Calculator

Backlog Burn Down translates open demand into days of production at the current net output rate. It helps planners explain whether late orders can be recovered with normal capacity or need overtime, outsourcing, or resequencing.

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 estimates how many production days are needed to clear the current backlog.

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: Use past-due and committed open order quantity for the same product family or work center.
  • Net good output rate: Use recent good output after scrap, downtime, and normal staffing limits.
  • Recovery schedule allowance: Add allowance for changeovers, material shortages, engineering holds, maintenance, and priority jobs.

How to use the result

  • Use it during ERP cleanup, MRP review, production scheduling, S&OP prep, purchasing decisions, shortage meetings, capacity planning, or daily shop-floor execution reviews.
  • This is a planning estimate. Confirm final commitments against current ERP/MRP records, released BOMs and routings, inventory accuracy, supplier commitments, open work orders, quality holds, and shop-floor constraints.

Common questions

  • What is the Backlog Burn Down calculator for? It estimates how many production days are needed to clear the current backlog.
  • What information do I need before using it? You need backlog quantity, net daily output rate, and a realistic recovery allowance.
  • How should I use the result? Use it to set recovery dates, prioritize late orders, decide on overtime, and communicate customer risk.
  • When is the result only an estimate? It is only an estimate when demand, inventory, lead time, routing hours, setup time, yield, supplier dates, or work-center capacity comes from forecast assumptions or stale ERP data instead of current orders and recent execution history.

Last reviewed 2026-05-12.