Project management · Practical guide

Cycle Time vs. Lead Time: Boundaries and Worked Examples

By My First Task editorial team

Updated October 2026

The short answer

Lead time measures elapsed time from a defined request or commitment to completion. Cycle time measures elapsed time from work starting to completion. The difference commonly includes waiting before active work begins.

How to approach the work

Define the event that starts each clock before collecting data. A request-created date, a ready-for-work date and a committed-to-delivery date are not interchangeable. Calendar days include nights and weekends; working-day measures use a stated calendar. Compare completed items with similar boundaries and work types. A mean describes an average, while percentiles can help show how much longer the slower items take.

A practical sequence

Choose the request or commitment event for lead time.
Choose the active-start event for cycle time.
Record the same completion event for both measures.
Use calendar days or a defined business calendar consistently.
Review the spread of completed items, not just the mean.
Investigate queues and blocked time when elapsed durations rise.

Illustrative scenario · not customer research

Worked example

A request arrives on Monday, work starts on Thursday and finishes on Saturday. Using elapsed calendar-day differences, lead time is five days and cycle time is two days. Three days were spent waiting before work started. If fifteen completed items have sixty combined cycle-days, mean cycle time is four days. The sixty is the sum of individual item durations, not the length of the reporting window.

Common mistakes to avoid

Mixing request-to-finish and start-to-finish durations.
Treating working days as calendar days.
Using the mean as a guaranteed deadline for every item.

Try the method with your own inputs

Free tool

Average Cycle Time Calculator

Calculate mean cycle time from the total elapsed days of completed work items.

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Free tool

Little's Law Calculator

Estimate average cycle time from average work in progress and average throughput in a stable workflow.

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Questions answered

Is cycle time the same as time spent working?

No. Elapsed cycle time usually includes waiting and blocked time after the start event. Logged effort hours measure a different quantity.

Can lead time be shorter than cycle time?

With a request event before work starts and the same finish event, lead time cannot be shorter. If your numbers suggest otherwise, check timestamps and definitions.

Which metric should I show a customer?

Use a measure with a start event that matches the customer's question, such as request-to-delivery. Explain its population and uncertainty rather than promising the average.

Apply it in a shared workspace

Keep the agreed owner, completion criteria and important decisions with the work. Explore the relevant My First Task feature.

Research context is available in our source library. The worked example above is an editorial illustration.

Method references

The Kanban Guide

Turn the plan into shared work

Give each next action an owner, a completion condition and a realistic date. My First Task brings tasks, boards, project workflows and issue tracking into one workspace.

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