How do you calculate a demand forecast gap margin?

Subtract committed demand from available forecasted demand to get the amount gap, then divide by a baseline reference. With 125 available and 100 committed against a 100 baseline, the gap is 25 units and the margin is 25%.

What is a good demand forecast gap for stamped and spring parts?

A small positive gap (roughly 5-15%) gives cushion for scrap and yield loss without overbuilding. A 25% gap like the worked example signals you're forecasting well above commitments and may over-order strip stock.

What does a negative gap mean?

If committed demand exceeds available forecast, the gap goes negative, meaning customers are pulling more than you planned for and you risk running short on wire or press capacity.

Why use a separate baseline reference instead of committed demand?

A stable baseline (like a rolling 12-month average) keeps the margin comparable across quarters, so a seasonal spike in one part doesn't distort the percentage.

Demand forecast gap vs. forecast accuracy?

Forecast accuracy compares forecast to actual after the fact; the gap margin is forward-looking, comparing forecast to what's currently committed so you can act before the build.

How often should I recompute this for a part family?

Recompute at every S&OP cycle and whenever a new EDI release lands, since micro-formed part programs can swing quickly with automotive and electronics demand.

Precision Springs, Stampings & Micro-Formed Components calculator

Demand Forecast Gap Calculator

Demand Forecast Gap measures how far your available (forecasted) part demand runs ahead of or behind the demand you're actually committed to fill, expressed as a percentage of a chosen baseline. Precision spring coilers, progressive-die stampers, and micro-forming shops use it to size coil-stock buys, plan press capacity, and decide whether to hold safety stock of high-run torsion springs or contact clips. Because these parts ship in millions of pieces against blanket POs and EDI releases, even a small percentage gap can mean tens of thousands of parts of over- or under-build. Watching this margin keeps raw wire, strip stock, and tooling life aligned with what the customer will actually pull.

What this calculator does

Estimate demand forecast gap for precision springs, stampings and micro-formed components using production-ready inputs so teams can measure the gap between available and required amounts.
Use it when demand forecast gap in precision springs, stampings and micro-formed components needs a clean margin number for a precision springs, stampings and micro-formed components go / no-go review.
It computes the percentage gap between available forecasted demand and committed demand, using a baseline reference as the denominator.

Formula used

Demand forecast gap amount gap = available demand forecast gap amount - required demand forecast gap amount
Demand forecast gap margin = amount gap ÷ reference demand forecast gap amount

Inputs explained

Available forecasted part demand (units):
Contracted or committed part demand (units):
Baseline demand reference (units):

How to use the result

Use it during S&OP reviews, blanket-PO reconciliation, or before releasing coil-stock and press time for a part family.
The margin is only as good as your forecast inputs; a stale or optimistic forecast will show a healthy gap that evaporates when EDI releases arrive.

Current U.S. benchmarks

The producer price index for steel mill products stands at 348.53 (BLS, May 2026), up 6.7% from a year earlier. Quotes priced off last quarter's material cost miss this move.
The U.S. has 53,790 fabricated metal products establishments employing about 1,441,471 workers (Census County Business Patterns, 2023).

Common questions

How do you calculate a demand forecast gap margin? Subtract committed demand from available forecasted demand to get the amount gap, then divide by a baseline reference. With 125 available and 100 committed against a 100 baseline, the gap is 25 units and the margin is 25%.
What is a good demand forecast gap for stamped and spring parts? A small positive gap (roughly 5-15%) gives cushion for scrap and yield loss without overbuilding. A 25% gap like the worked example signals you're forecasting well above commitments and may over-order strip stock.
What does a negative gap mean? If committed demand exceeds available forecast, the gap goes negative, meaning customers are pulling more than you planned for and you risk running short on wire or press capacity.
Why use a separate baseline reference instead of committed demand? A stable baseline (like a rolling 12-month average) keeps the margin comparable across quarters, so a seasonal spike in one part doesn't distort the percentage.
Demand forecast gap vs. forecast accuracy? Forecast accuracy compares forecast to actual after the fact; the gap margin is forward-looking, comparing forecast to what's currently committed so you can act before the build.

Last reviewed 2026-05-12.