Definition
Waste is any activity, resource consumption or condition that uses time, effort, materials or capital without contributing to the intended value or desired outcome.
Human Explanation
Waste is work that consumes resources but does not create value. It can appear as unnecessary movement, waiting, defects, overproduction, excessive inventory, rework or any activity that the customer would not willingly pay for.
Why it Matters
Identifying waste allows organisations to improve flow, reduce costs, shorten lead times and increase overall system performance without reducing the value delivered to the customer.
Conceptual Boundary
Waste is not simply any cost or activity. Some activities do not create direct value but remain necessary because of legal, regulatory, safety or operational requirements. Waste exists where resources are consumed without supporting either value creation or necessary system operation.
Practical Perspective
Eliminating waste should never become an objective by itself. Removing an activity that appears wasteful without understanding the process may reduce overall system performance or introduce new risks.