Cycle Time: How Long the Work Actually Takes
Cycle time vs. takt time vs. lead time
Three times, three different questions, and confusing them is the most common timing mistake on a floor. Takt time is the pace the customer requires — a target. Cycle time is how long one unit actually takes at one step — a measurement. Lead time is how long a unit takes from start to finish through the whole stream — the customer's experience. A step can have a cycle time shorter than takt and still fail the customer, if the unit waits days between steps. A line can hit takt at every step and still carry a terrible lead time, if inventory piles between them. Know which clock you are reading before you act on it, or you will fix the wrong number.
Measuring it honestly on the floor
Cycle time is measured with a stopwatch at the station, over real cycles, with real variation — not taken from the routing sheet, not averaged into meaninglessness. Time ten cycles. Write down all ten, not just the average, because the spread tells you as much as the middle: a station that runs forty seconds nine times and three minutes once has a problem the average hides. Measure with the operator who does the job, not behind their back, and say plainly why you are measuring: to balance the work, not to time the person. Measurement done in secret breeds resistance. Measurement done openly builds the case for fixing the station.
Balancing work to the pace
Once every step's cycle time is known, balancing is arithmetic with judgment. Steps longer than takt are split, supported, or redesigned. Steps shorter than takt absorb work from their neighbors. The goal is a line where no station starves the next and none floods it — every station finishing near the same beat, so work flows instead of queuing. Perfect balance is rare and not required; close balance, held by standard work, beats perfect balance on paper that collapses on Tuesday. Rebalance when demand changes, when the product changes, or when the measurements drift — which is to say, regularly, because lines are living things.
When cycle time drifts: what it is telling you
Cycle time drift is a diagnostic, not a scolding. A station drifting long is saying something: a tool is wearing, a part is varying, a sequence is awkward, an operator is new and untrained, a quality check got added without removing anything. The leader's job is to hear that message on the floor instead of discovering it in next week's numbers. Drift caught early is a small fix. Drift caught late is overtime, expediting, and a missed shipment — the same stall pattern described in Why Your Lean Transformation Is Stalling Out. The discipline of catching it daily is Leader Standard Work, and the system is in The Lean Culture Blueprint.
Measure and hold the pace from your pocket: https://apps.apple.com/us/app/lean-culture-advisory/id6790203662