Takt Time

391. Takt Time

The pace of production needed to match customer demand. From German Takt (beat, rhythm).

Takt time = \frac{available production time}{customer demand}

If customers want 80 units in an 8-hour shift, the line must produce one unit every $\frac{480}{80} = 6$ minutes.

391.1. Why takt time matters

Takt is the target cycle time for each station and the line overall:

Slower than takt: line can’t keep up — backlogs accumulate
Faster than takt: line overproduces — inventory accumulates (waste)
At takt: production synchronized with demand — lean ideal

In lean manufacturing, every station is designed to complete its work in less than or equal to the takt time, with engineered slack absorbed by Heijunka boxes / standard WIP.

391.2. Calculating takt

Available time: net production time available, after deducting:

Breaks
Meetings
Changeovers (or carefully scheduled outside production)
Planned maintenance

Customer demand: actual delivery requirement, including:

Customer orders
Forecast adjustments
Safety / replenishment stock targets

391.3. Worked example

Factory:

Two shifts, 8 hours each, 1 hour total breaks per shift
Net available time: $2 \cdot 7 = 14$ hours/day $= 840$ minutes/day
Customer demand: 200 units/day

Takt time = \frac{840}{200} = 4.2 minutes per unit

So each station must complete its task in 4.2 minutes or less. The overall line cadence is one unit out every 4.2 minutes.

391.4. Takt time vs cycle time

Takt time: external (driven by demand) — target cadence
Cycle time: internal (driven by process) — actual time per unit

Goal: $cycle time \leq takt time$ . When equality holds, line runs perfectly to demand — no over- or under-production.

391.5. Takt time vs throughput

Takt time	time between units leaving the line
Throughput	units per unit time = $\frac{1}{takt}$

Inverses. Both convey same information.

391.6. Heijunka — level loading

Demand is rarely flat — peaks Monday, valleys Friday, etc. Heijunka (here) smooths production by aggregating demand and producing in a level cadence. Takt is then calculated from average demand, not peak.

391.7. Limitations

Volatile demand — takt changes; need flexibility to adjust
Mix complexity — multiple products with different cycle times need EPEI or sequenced production
Setup-heavy lines — takt time may be longer than nominal cycle time once setups are included

391.8. See also

Line Balancing — designing stations to meet takt
Heijunka — level loading
Kanban Sizing — pull control matching takt
Little’s Law