Lead time, cycle time and takt time describe different questions in manufacturing. Confusing them can make a capacity plan appear correct while customer delivery performance deteriorates.
Lead time
Manufacturing lead time measures elapsed time from a defined starting point to completion or delivery. It includes processing as well as queueing, transport, waiting and other delays. Always specify exactly where the measurement begins and ends.
Cycle time
Cycle time commonly means the observed time between completed units or the duration of an operation, depending on context. State the definition and measurement boundary before comparing work centers or estimating capacity.
Takt time
Takt time expresses the production pace required by customer demand: available production time divided by required units. If 420 minutes are available and demand is 210 units, takt is two minutes per unit.
How to use them together
A process may have a 90-second operation cycle but a five-day order lead time due to queues. Meeting takt at one workstation does not automatically shorten those queues; flow, WIP and bottleneck management matter.
Conclusion
Use cycle time to understand process speed, takt time to understand demand pace and lead time to understand customer waiting.
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