Manufacturing & production
Takt time and line balancing: matching production to demand
How to calculate takt time, compare it with cycle times, balance work across stations, compute balance efficiency and fix bottlenecks, with worked examples.
Takt time is the pace at which a line must produce to meet customer demand. Line balancing distributes work across stations so each one finishes close to that pace, without bottlenecks or idle operators. Together they help assembly, packing and garment lines produce what customers need with the right number of people.
Takt time
Takt time = available production time ÷ customer demand
Example: a packing line runs 2 shifts of 8 hours (960 minutes), with 2 one-hour breaks (120 minutes). Available time = 840 minutes. Daily demand = 420 cases. Takt time = 840 ÷ 420 = 2 minutes per case.
The line must finish one case every 2 minutes on average.
Takt time vs. cycle time
| Term | Meaning |
|---|---|
| Takt time | Required pace to meet demand |
| Cycle time | Actual time a station or line takes per unit |
| Lead time | Total time a unit spends from start to finish, including waiting |
If a station's cycle time is longer than takt time, it is a bottleneck: the line cannot meet demand without changes. If cycle times are much shorter than takt, operators wait or overproduce.
Line balancing
List the tasks, their times and their sequence, then assign tasks to stations so each station's total time is at or below takt time.
Example: an assembly with total task time of 9 minutes and a takt time of 2 minutes.
- Theoretical minimum stations = 9 ÷ 2 = 4.5, so at least 5 stations.
- With 5 stations: balance efficiency = total task time ÷ (stations × takt time) = 9 ÷ (5 × 2) = 90%.
| Station | Tasks | Station time (min) |
|---|---|---|
| 1 | Prepare base, insert parts | 1.9 |
| 2 | Attach frame | 1.8 |
| 3 | Wiring | 2.0 |
| 4 | Fit cover, fasten | 1.7 |
| 5 | Test and pack | 1.6 |
| Total | 9.0 |
Station 3 is at takt and sets the pace. Small delays there stop the line, so it gets priority for improvement.
Fixing bottlenecks
- Move tasks from the bottleneck to stations with spare time, respecting sequence
- Simplify bottleneck tasks with better tools, fixtures or methods
- Add capacity at the bottleneck (a second operator or machine)
- Reduce variation: a station that averages 1.8 minutes but sometimes takes 3 minutes still causes stoppages
- Pre-stage materials so operators don't walk or wait
When demand changes
Takt time changes with demand. In peak seasons, such as before Christmas, takt shortens and lines may need more stations or shifts. In low seasons, rebalance with fewer operators rather than letting everyone slow down. Recompute takt whenever the production plan changes significantly (production planning).
Measuring actual performance
Compare actual output per hour with the takt-based target in the daily production report. Persistent gaps point to downtime, slow stations or quality losses (OEE and production KPIs).
Where Cirquolus fits
The Cirquolus production management system records output through line, mobile and countertop processing and monitors productivity and performance, so actual pace can be compared with planned rates. Line improvements can be managed as projects in the Business Compass improvement portfolio. Related: lean manufacturing.
Frequently asked questions
What is takt time?
The required production pace to meet customer demand: available production time divided by demand.
What is the difference between takt time and cycle time?
Takt time is the pace demand requires. Cycle time is how long a station or process actually takes per unit.
How do you calculate the number of stations needed?
Divide total task time by takt time and round up.
What is line balancing efficiency?
Total task time divided by the number of stations multiplied by takt time.
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