Takt time vs cycle time vs lead time: calculate the right clock
A worked shift example separates customer pace, observed process speed and end-to-end delivery time, with practical checks before changing the line.
Takt time sets the pace required by customer demand. Cycle time describes how often an operation actually completes a unit. Lead time measures how long a unit or order takes to travel through the chosen system. Putting all three on a board is useful only when their boundaries are clear.
One shift, three different clocks
Consider an illustrative 480-minute shift with 30 minutes of breaks and demand for 600 good units. Net available time is 450 minutes, so takt is 450 × 60 / 600 = 45 seconds per unit. The required pace is 80 units per net production hour. Reproduce the numbers in the takt time calculator.
Suppose a timed station completes one part every 40 seconds while running. That is its observed cycle, leaving five seconds below takt. A tagged part may still take three days to reach dispatch because it waits in batches, inspection queues and finished-goods storage. Reducing the 40-second cycle by two seconds does little for that three-day lead time unless it relieves the actual constraint or reduces queues.
Write the boundaries beside the numbers
| Measure | Start and finish | Useful question |
|---|---|---|
| Takt | Available time and demand for the same period | What completion pace is required? |
| Cycle | Repeated completion at a defined operation | Can this operation sustain the pace? |
| Production lead time | Entry to exit of the defined production stream | Where does a unit wait? |
| Order lead time | Order acceptance to customer delivery | What delivery commitment is realistic? |
Timed machine motion can omit loading, unloading, checks and replenishment. Record a complete repeating operator or machine cycle when those tasks limit output. For mixed products, retain the product and route with each observation; an overall average can hide the difficult family that consumes the schedule.
Account for losses without changing demand
Breakdowns do not reduce customer demand. Subtract agreed planned exclusions when defining available time, then assess whether downtime and yield leave enough effective capacity. If the 40-second station has 90% availability and 98% good-unit yield, expected shift output is 675 × 0.90 × 0.98 = 595.35 good units, slightly below the 600-unit requirement. Use the capacity calculator to expose the gap.
A buffer may protect a constraint from short interruptions, but it does not create capacity. Check the OEE loss tree and line-balancing guide before buying faster equipment.
A useful first observation
Follow a representative part from release to dispatch. Time the repeating work at the suspected constraint and separately record stops, queues and rejects. Review the record with operators: an omitted material-replenishment trip can matter more than the automatic cycle displayed by the PLC. Update the planning assumptions only after the boundary is agreed.
Sources and further work
The Lean Enterprise Institute definitions of takt and cycle time distinguish demand pace from observed completion. The shift and queue examples here are illustrative calculations. Continue with the manufacturing performance path.
Cite this page: Takt time vs cycle time vs lead time: calculate the right clock
, Shopfloor, 2026-10-11. https://shopfloor.space/articles/takt-time-cycle-time-lead-time/