ch3_lean_2

Idle time waste waiting timequeue time lost labor 3

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Unformatted text preview: ties greater than market need 2. Idle time waste (waiting time/queue time) lost labor 3. Transporting/conveyance waste increased energy costs 4. Processing waste: waste in the work itself requires more inputs than necessary 5. Inventory waste (having unnecessary stock on hand) excessive inventory holding cost 6. Wasted operator motion (using unnecessary motion) nonproductive time 7. Producing defective goods (waste of rejected production) additional labor and material cost 22 2.2 Background of Lean • Ohno found a new way to coordinate the flow of parts in the supply system on a day-to-day basis so that parts would only be produced at each step to meet the immediate demand of the succeeding operation. • This led to the development of the Toyota Production System (Ohno 1988). • In 1992, Lauri Koskela addressed the application of (lean) manufacturing techniques to construction. • Glenn Balard and Koskela collaborated on lean production and held a conference in Finland in 1993, which became the first meeting of the Interna...
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