How do you calculate good tooling output capacity?

Multiply output per cycle by available cycles to get gross capacity, then multiply by uptime and first-pass yield. With 4 units/cycle over 480 cycles at 90% uptime and 97% yield, gross is 1,920 and good capacity is 1,676.16 units.

What is the difference between gross and good capacity?

Gross capacity (1,920 units) is what the tool could make if it never stopped and never scrapped. Good capacity (1,676.16 units) is what's left after 192 units of downtime loss and 51.84 units of yield loss.

How much output does downtime cost here?

At 90% uptime, the 10% downtime removes 192 units from the 1,920-unit gross — that's the preventive maintenance downtime loss line, before yield is even applied.

What is a good preventive maintenance uptime target?

For well-maintained tooling, 90% or better between PMs is a common floor; high-availability cells target the mid-90s. Below the mid-80s, either the PM cadence is too loose or the tool is aging out.

Can too much preventive maintenance hurt capacity?

Yes. Over-servicing consumes available cycles and can drag gross capacity down. The right cadence maximizes good capacity — the product of uptime and yield — not uptime alone.

How is yield loss different from downtime loss?

Downtime loss (192 units) is capacity the tool never ran. Yield loss (51.84 units) is parts it ran but scrapped at 97% first-pass yield. Both cut into good capacity but you fix them differently — cadence versus process control.

Tooling, Fixtures, Dies & Mold Economics calculator

Preventive Tooling Maintenance Calculator

Preventive tooling maintenance capacity is the good, sellable output a tool can produce over a period once you account for the uptime it holds between scheduled maintenance and the yield it delivers coming off PM. Tooling and production engineers use it to justify a PM cadence: the goal is to schedule maintenance often enough that uptime and first-pass yield stay high, without burning so many cycles on service that gross capacity collapses. This calculator takes gross capacity and multiplies it down by uptime and first-pass yield, then shows exactly how many units you lose to downtime versus scrap. It turns a maintenance schedule into an output number the plant floor actually cares about.

What this calculator does

Estimate preventive tooling maintenance for tooling, fixtures, dies and mold economics using production-ready inputs so teams can confirm whether capacity can cover demand before committing the schedule.
Use it when preventive tooling maintenance in tooling, fixtures, dies and mold economics is being asked to take on more work and you need to know if there is room.
It computes good output capacity by multiplying output per cycle times available cycles by expected uptime and first-pass yield, and reports the downtime and yield losses separately.

Formula used

Gross preventive tooling maintenance capacity = preventive tooling maintenance output per cycle × available preventive tooling maintenance cycles
Good preventive tooling maintenance capacity = gross capacity × expected preventive tooling maintenance uptime × expected preventive tooling maintenance first-pass yield

Inputs explained

Parts produced per maintenance cycle:
Maintenance cycles available in the period:
Expected tooling uptime between PMs:
Expected first-pass yield after PM:

How to use the result

Use it when setting or defending a preventive maintenance cadence for a tool, or forecasting realistic good output for capacity planning.
Uptime and yield are entered as flat expected percentages, so it assumes the tool holds those rates across the whole period; a tool degrading toward end-of-life between PMs will underperform the estimate.

Current U.S. benchmarks

The producer price index for plastic resins and materials stands at 319.371 (BLS, May 2026), up 19.5% from a year earlier. Quotes priced off last quarter's material cost miss this move.
The U.S. has 14,378 furniture and related products establishments employing about 355,594 workers (Census County Business Patterns, 2023).

Common questions

How do you calculate good tooling output capacity? Multiply output per cycle by available cycles to get gross capacity, then multiply by uptime and first-pass yield. With 4 units/cycle over 480 cycles at 90% uptime and 97% yield, gross is 1,920 and good capacity is 1,676.16 units.
What is the difference between gross and good capacity? Gross capacity (1,920 units) is what the tool could make if it never stopped and never scrapped. Good capacity (1,676.16 units) is what's left after 192 units of downtime loss and 51.84 units of yield loss.
How much output does downtime cost here? At 90% uptime, the 10% downtime removes 192 units from the 1,920-unit gross — that's the preventive maintenance downtime loss line, before yield is even applied.
What is a good preventive maintenance uptime target? For well-maintained tooling, 90% or better between PMs is a common floor; high-availability cells target the mid-90s. Below the mid-80s, either the PM cadence is too loose or the tool is aging out.
Can too much preventive maintenance hurt capacity? Yes. Over-servicing consumes available cycles and can drag gross capacity down. The right cadence maximizes good capacity — the product of uptime and yield — not uptime alone.

Last reviewed 2026-05-12.