The takt time formula
Takt time = available production time ÷ customer demand
Available time is the scheduled working time minus planned breaks and planned downtime. Demand is what the customer actually needs in the same period, not what the plant would like to make.
A worked example
A packing line runs one eight-hour shift. Breaks and the planned handover take 30 minutes, so 450 minutes are available. Customers require 300 cases per shift.
Takt time = 450 ÷ 300 = 1.5 minutes. The line must complete a case every 90 seconds. If the slowest station takes 100 seconds, the line cannot meet demand without overtime; if every station takes 60 seconds, the line is overproducing or waiting.
Takt time, cycle time and lead time
- Takt time is the required pace, set by demand.
- Cycle time is the actual time to complete one unit at a station or line.
- Lead time is the total elapsed time from order (or start) to delivery, including waiting.
The design goal is cycle time at or just below takt at every station, so work is balanced and nothing waits or overproduces.
What takt time is used for
- Line balancing: distributing work so each station's cycle time fits within takt.
- Staffing: total work content divided by takt gives the number of operators needed.
- Visual management: an hour-by-hour board compares actual output with the output takt implies, so a shortfall is visible within the hour, not at the end of the shift.
- Spotting problems: a station regularly over takt is where the next improvement is.
Common mistakes
- Using machine capacity or a target instead of real customer demand.
- Ignoring planned downtime, which makes takt look easier than it is.
- Calculating it once and never revisiting it as demand changes.
- Treating takt as a target for operators to chase rather than a design parameter for the process.
Takt time and daily management
Hour-by-hour output against the takt-derived plan is one of the most useful measures on a Tier 1 board, because the gap appears while there is still time in the shift to act on it.