Why do the recovery rows not add to the shortfall?

Availability and yield multiply, so some parts would have been rejected during time the line was not running. That overlap is recovered only when both are fixed, and it grows as either figure falls.

Should downtime come out of hours or availability?

Availability only. Scheduled hours is the shift pattern and availability is what survives inside it. Deducting twice compounds the error and understates capacity.

Which improvement should I fund first?

Compare each single-fix recovery against what fixing it costs. Availability usually dominates when cure is under control, but a marginal cure window can invert that ranking.

Does the daily figure include rework?

No. Re-cured parts are not first-pass good, so they belong in rejects here and their cost belongs on the rework calculator.

UV Curing calculator

UV Line Capacity Calculator: Daily Output and What Each Fix Returns

Work out the good parts a cure line makes in a day from its running rate, scheduled hours, availability and yield. The result splits the shortfall into what fixing availability returns, what fixing yield returns, and what needs both.

What this calculator does

Daily good output from an hourly cure rate and schedule, split into what fixing availability and yield each return.

Formula used

Gross daily capacity = cured parts per hour × scheduled hours per day
Net good parts per day = gross × availability × first-pass yield
Recovered by fixing availability alone = gross × (1 − availability) × yield
Recovered by fixing yield alone = gross × availability × (1 − yield)
Recovered only by fixing both = gross × (1 − availability) × (1 − yield)

Inputs explained

Cured Parts per Hour at Speed: Running rate at a speed that delivers the required dose.
Scheduled Run Hours per Day: Hours the line is scheduled to run, before availability is applied.
Line Availability / Uptime: Share of scheduled hours the line actually runs, including changeovers and warm-up.
First-Pass Cure Yield: Share of parts passing cure at the first attempt, cure defects only.

How to use the result

Best suited to building a daily plan from a line rate, ranking availability work against yield work, testing how optimistic availability changes a plan.
Cannot verify the hourly rate cures, because line speed is not checked here. Averages availability across the day, so stop-start and steady running read the same. Excludes rework and assumes the cure station is the line's constraint.

Common questions

Why do the recovery rows not add to the shortfall? Availability and yield multiply, so some parts would have been rejected during time the line was not running. That overlap is recovered only when both are fixed, and it grows as either figure falls.
Should downtime come out of hours or availability? Availability only. Scheduled hours is the shift pattern and availability is what survives inside it. Deducting twice compounds the error and understates capacity.
Which improvement should I fund first? Compare each single-fix recovery against what fixing it costs. Availability usually dominates when cure is under control, but a marginal cure window can invert that ranking.
Does the daily figure include rework? No. Re-cured parts are not first-pass good, so they belong in rejects here and their cost belongs on the rework calculator.

Last reviewed 2026-10-01.