Manufacturing Industry

Just in time

"Just in time" was originally a management system used for manufacturing industry

JUST-IN-TIME (JIT) PRODUCTION

JIT is a management philosophy that strives to eliminate sources of manufacturing waste by producing the right part in the right place at the right time. Waste results from any activity that adds cost without adding value, such as moving and storing. In this company the stores occupied a massive area where hundreds of roughly metre cube bins contain one component each The number of components in a bin was never known so periodically when A large order came in the bin was emptied and counted. Often many of the boittom most pieces were damaged by long storage.

JIT (also known as lean production or stockless production) should improve profits and return on investment by reducing inventory levels (increasing the inventory turnover rate), improving product quality, reducing production and delivery lead times, and reducing other costs (such as those associated with machine setup and equipment breakdown). In this companies case the bin system was removed goods were made, packed a shipped in one quick operation no major stock was kept of any item. By applying a JIT system, The general idea is to establish flow processes by linking the core shop, foundry, CAM section by giving the logistics section overall control of throughput. So that there is an even, balanced flow of materials throughout the entire production process.

Keys to Successful JIT Implementation

1. This comapny actually moved away from end item inventory which is contray to JIT principles
2. Setup times were lowered by the introduction of CAD and CAM
3. Reduce lot sizes (manufacturing and purchase): reducing setup times allows economical production of smaller lots; close cooperation with suppliers is necessary to achieve reductions in order lot sizes for purchased items, since this will require more frequent deliveries.
4. Reduce production and delivery lead times: delivery lead times can be reduced through close cooperation with suppliers, often via internet link up.
5. Preventive maintenance: use machine and worker idle time to maintain equipment and prevent breakdowns
6. Flexible work force: workers should be trained to operate several machines, to perform maintenance tasks, and to perform quality inspections. In general, the attitude of respect for people leads to giving workers more responsibility for their own work. The reduced tiers of control and the establishment of quality circles and team working lead to this. There was substantial retaining of managers to facilitate this.
7. There was no zero defects quality program raw matterials like ores and scrap don't have defects
8. Small-lot (single unit) conveyance: use a control system such as a card system to convey parts between work stations in small quantities (ideally, one unit at a time).

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