One key added value process is the reduction or elimination of waste activities and processes. One of the early manufacturing quality gurus, Taichi Ohno, introduced the concept of the ‘Seven Wastes‘: areas that could be targeted in the manufacturing process in order to eliminate or improve the efficiency of operations.
- Transportation – Moving materials unnecessarily between locations.
- Inventory – Unnecessary stock-holding.
- Motion – Unnecessary motions which cause reduced productivity.
- Waiting – Delays or queues in processing.
- Over-production – Producing output in excess of demand.
- Over-processing – Over specifying.
- Defects – Reword and scrap.
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