Can I enter OEE availability as uptime?

Only after rescaling it. OEE availability divides run time by planned production time, which leaves breaks out; this uptime divides by paid shift time. Multiply availability by planned production minutes, then divide by paid shift minutes.

Should I use the ideal cycle time or the cycle I actually see?

Use the running cycle you time at the bottleneck, slow cycles included. This model has no separate performance factor, so a nameplate cycle overstates output by however far the machine runs below rated speed.

Why does the line make less than the bottleneck rate says?

Because the bottleneck also starves and blocks. When an upstream stop empties the buffer, the bottleneck waits and that minute is lost to the whole line. Log those waits as downtime so uptime reflects them.

Is adding a shift or cutting cycle time the better fix?

Check the longest-cycle row first. If a fixture change or moving work off the bottleneck reaches that cycle, you gain the output without new shift labor; if not, add shift time and recheck.

Production calculator

Throughput Calculator

Estimate the good units your line makes per hour, shift and day from its bottleneck, and see whether that covers daily demand. You need the bottleneck cycle, uptime, yield, shift pattern and demand.

What this calculator does

Good units per hour, shift and day from the bottleneck cycle, checked against daily demand.

Formula used

Gross rate = 3,600 ÷ bottleneck cycle time
Good throughput = gross rate × uptime % ÷ 100 × good yield % ÷ 100
Good units per shift = good throughput × shift length; good units per day = per shift × shifts per day
Demand coverage = good units per day ÷ daily demand × 100; daily surplus = good units per day − daily demand
Longest cycle that meets demand = 3,600 × shift length × shifts × uptime % ÷ 100 × yield % ÷ 100 ÷ daily demand

Inputs explained

Bottleneck Cycle Time: Slowest station's running cycle, slow cycles included, timed on the floor.
Uptime: Share of paid shift time the bottleneck runs, from downtime logs.
Good Yield: First-pass good units ÷ units started, from inspection counts.
Shift Length: Paid hours per shift; breaks count as downtime in uptime.
Shifts per Day: Production shifts per day; 1.5 for a short second shift.
Daily Demand: Good units per day that orders or the schedule require.

How to use the result

Best suited to quoting a new order against line capacity, sizing the output gain from a maintenance project, deciding whether demand needs a second shift.
One cycle, uptime and yield for the whole day; mix changes and ramp-up make it optimistic. Starved and blocked bottleneck minutes count only if your downtime log includes them in uptime.

Current U.S. benchmarks

The U.S. has 21,668 machinery manufacturing establishments employing about 1,086,146 workers (Census County Business Patterns, 2023).

Common questions

Can I enter OEE availability as uptime? Only after rescaling it. OEE availability divides run time by planned production time, which leaves breaks out; this uptime divides by paid shift time. Multiply availability by planned production minutes, then divide by paid shift minutes.
Should I use the ideal cycle time or the cycle I actually see? Use the running cycle you time at the bottleneck, slow cycles included. This model has no separate performance factor, so a nameplate cycle overstates output by however far the machine runs below rated speed.
Why does the line make less than the bottleneck rate says? Because the bottleneck also starves and blocks. When an upstream stop empties the buffer, the bottleneck waits and that minute is lost to the whole line. Log those waits as downtime so uptime reflects them.
Is adding a shift or cutting cycle time the better fix? Check the longest-cycle row first. If a fixture change or moving work off the bottleneck reaches that cycle, you gain the output without new shift labor; if not, add shift time and recheck.

Related guides

A Plant Leader's Playbook for Managing Throughput

Last reviewed 2026-10-01.