ERP & MRP Planning calculator
Production Promise Date Calculator
Production Promise Date estimates how many calendar days should be added before promising shipment or completion.
What this calculator does
- Estimate promise-date offset from order queue, manufacturing, quality release, and shipment buffer days.
- customer service needs a realistic production promise offset
- It estimates the number of days needed before a production order can be promised complete or shipped.
Formula used
- Promise-date offset = queue time + manufacturing time + quality/release time + shipment buffer
Inputs explained
- Order queue before start: Use backlog wait time before the order can start at the first operation.
- Manufacturing execution time: Use routing-based production time for the planned lot and shift pattern.
- Quality, paperwork, and release time: Include inspection, test, certification, ERP completion, and document release.
- Shipment and promise buffer: Add pack, ship, customer buffer, or planning contingency.
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 Production Promise Date calculator for? It estimates the number of days needed before a production order can be promised complete or shipped.
- What information do I need before using it? You need queue, manufacturing, quality/release, and shipment buffer days.
- How should I use the result? Use it to set customer promise dates, negotiate due dates, and flag orders that cannot ship on time.
- 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.