![]() Defects - Inspecting and quarantining inventory takes time and costs money.Workplace ergonomics assessment should be conducted to design a more efficient environment. Unnecessary motion - Resources are wasted when workers have to bend, reach or walk distances to do their jobs.Excessive inventory wastes resources through costs of storage and maintenance.Inappropriate processing - Overly elaborate and expensive equipment is wasteful if simpler machinery would work as well.Transportation - Moving a product between manufacturing processes adds no value, is expensive and can cause damage or product deterioration.According to some estimates, as much as 99 percent of a product's time in manufacture is actually spent waiting. Instead, the flow of operations should be smooth and continuous. Waiting - Processes are ineffective and time is wasted when one process waits to begin while another finishes.Overproduction - Manufacture of products in advance or in excess of demand wastes money, time and space.The categories are an integral part of the TPS (known as lean production in North America).įollowing are the seven wastes, as categorized by Taiichi Ohno: The seven wastes are categories of unproductive manufacturing practices identified by Taiichi Ohno, the father of the Toyota Production System (TPS).
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