How do you calculate a demand forecast gap?

Subtract forecast demand from your available good capacity, then divide by the baseline forecast and multiply by 100. With 8,200 good parts against a 9,600-part forecast, the gap is -1,400 parts, or -14.58% of the 9,600 baseline.

What does a negative forecast gap mean?

It means capacity falls short of forecast. A -14.58% gap says you can cover only about 85% of expected ceramic orders — a clear trigger to add a kiln cycle, expedite, or renegotiate delivery dates before you miss commitments.

What is a good demand forecast gap for technical ceramics?

A small positive gap of roughly +5% to +10% is healthy: enough slack to absorb yield loss and rush orders without stranding capital in idle furnace capacity. A double-digit negative gap, like -14.58%, signals you will likely backorder.

Why use a separate baseline forecast in the denominator?

It lets you measure the gap against a stable reference — last period's plan or the committed budget — rather than against a moving demand number. Here the forecast and baseline are both 9,600, so the percentage maps directly onto current demand.

Should capacity here be gross or good parts?

Always good, yield-adjusted parts. Ceramics scrap to cracking, warping, and dimensional rejects, so feeding gross furnace throughput into this calc overstates what you can ship and hides the real gap.

How is this different from a simple capacity utilization number?

Utilization tells you how busy the plant is; the forecast gap tells you whether that busyness is enough to meet demand. You can run at 95% utilization and still show a -14.58% gap if forecast orders outpace good output.

Advanced Technical Ceramics calculator

Technical Ceramic Demand Forecast Gap Calculator

In advanced technical ceramics, lead times are long, kiln cycles are inflexible, and yield is never 100% — so the gap between the good parts you can actually deliver and what the forecast says customers will order is the number that keeps planners awake. This calculator expresses that gap as a percentage of the baseline forecast, turning a raw parts shortfall into a planning signal you can act on. Operations managers and S&OP leads in alumina, AlN, zirconia, and SiC plants use it to flag when to add kiln capacity, requalify a second supplier, or push back on a sales commitment before the order is taken. A negative gap means you are short of forecast; a positive one means slack you can sell into or use to rebuild buffer stock.

What this calculator does

Calculate the percent gap between forecast ceramic demand and available good-part capacity using demand, capacity, and reference demand basis.
a demand planner needs to compare forecast ceramic orders against available production capacity
It computes the difference between available good ceramic capacity and forecast demand, then states that gap as a percentage of a baseline forecast.

Formula used

Capacity gap versus forecast = available good ceramic capacity - forecast ceramic demand
Demand forecast gap = capacity gap versus forecast ÷ reference forecast demand × 100

Inputs explained

Available good ceramic output:
Forecast ceramic order demand:
Baseline forecast for the period:

How to use the result

Use it during sales and operations planning, before committing to a large order, or when reviewing whether yield-adjusted capacity covers the next period's demand.
It is a single-period snapshot using the numbers you enter — it does not model yield variability, work-in-process timing, or the long ceramic lead times that mean today's gap may already be locked in by furnace loading decisions made weeks ago.

Current U.S. benchmarks

Steel mill PPI stands at 348.53 (BLS, May 2026), up 6.7% from a year earlier. New factory orders are up 2.3% year over year (Census).

Common questions

How do you calculate a demand forecast gap? Subtract forecast demand from your available good capacity, then divide by the baseline forecast and multiply by 100. With 8,200 good parts against a 9,600-part forecast, the gap is -1,400 parts, or -14.58% of the 9,600 baseline.
What does a negative forecast gap mean? It means capacity falls short of forecast. A -14.58% gap says you can cover only about 85% of expected ceramic orders — a clear trigger to add a kiln cycle, expedite, or renegotiate delivery dates before you miss commitments.
What is a good demand forecast gap for technical ceramics? A small positive gap of roughly +5% to +10% is healthy: enough slack to absorb yield loss and rush orders without stranding capital in idle furnace capacity. A double-digit negative gap, like -14.58%, signals you will likely backorder.
Why use a separate baseline forecast in the denominator? It lets you measure the gap against a stable reference — last period's plan or the committed budget — rather than against a moving demand number. Here the forecast and baseline are both 9,600, so the percentage maps directly onto current demand.
Should capacity here be gross or good parts? Always good, yield-adjusted parts. Ceramics scrap to cracking, warping, and dimensional rejects, so feeding gross furnace throughput into this calc overstates what you can ship and hides the real gap.

Last reviewed 2026-05-12.