Definition
Lead Time is the total elapsed time between initiating a request and delivering the completed result.
Human Explanation
Lead Time includes processing, waiting, transport, inspection and every other activity that occurs before the customer receives the final outcome.
Why it Matters
Reducing Lead Time improves responsiveness, customer satisfaction and operational flexibility.
Conceptual Boundary
Lead Time is broader than Cycle Time because it includes all waiting and delays throughout the process.
Practical Perspective
Most Lead Time is often spent waiting rather than performing value-adding work.