The start and finish points matter
Lead time usually describes a broader end-to-end wait from request to completion, while cycle time often describes the period an item is actively within a process or step. Organizations use these terms differently, so the measurement boundary should always be written down.
A process can improve cycle time without improving total lead time if queues dominate. Conversely, better scheduling can reduce lead time even if the hands-on task remains unchanged.
Measure what supports the decision
Customers usually care about end-to-end elapsed time. Staffing decisions often need touch or cycle time. Process improvement may require both plus queue time at each handoff.
Avoid comparing numbers from different teams until you know they share the same start, stop, calendar and pause rules.
Use the calculators as planning aidsMake your assumptions visible, then replace generic assumptions with your own measured data or authoritative requirements when available.