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JIT(Just In Time)

저는 전문강사가 아닙니다 . CPIM 에 대한 지식 ? 많이 부족합니다 . 하지만 이자리에서는 프로가 되려고 합니다 . CBPICS 6 기 이창재 J I T CBPICS 6 기 이 창 재Contents CONTENTS Just-in-Time Manufacturing Waste JIT Environment Uninterrupted Flow Manufacturing Planning Control in a JIT Environment1. Just-in-Time Manufacturing. 1. Just-in-Time Manufacturing. ▪ Just-in-Time philosophy. Waste 제거 and 계속적 개선 (Kaizen) The long-term result of eliminating waste is a cost-efficient, quality-oriented, fast-response organization that is responsive to customer needs . E R I ( 에라이 ) E limination R educe I mprove(kaizen) Waste Waste1. Just-in-Time Manufacturing. ▪ Adding Value.( 부가가치 - 가치를 부여 ) RIGHT Parts, RIGHT quantities, RIGHT time, RIGHT Place - Value satisfies the actual and perceived needs of the customer and does it at a price the customer can afford and considers reasonable. - Another work for this is quality.” - Value starts in the marketplace when marketing must decide what the customer wants. Figure 1. Product Development Cycle. Marketplace (Cg the development of machinery and equipment specially designed to make the limited range of products quickly and cheaply.( 빠르고 싸다 .) : Reducing the number of setups because of fewer task changes.( 셋업의 감소 ) : Allowing labor to develop speed and dexterity because of fewer task changes. ( 작업자 속도와 능력의 증가 ) ․ Product and market focus.( 특정 제품이나 고객에 맞춰 수요 등 관리 ) : Product and market focus can be based on characteristics such as customer grouping(serving similar customers), demand characteristics(volume), or degree of customization.( 비슷한 특성의 고객을 그룹화 , 수요특성 ( 양 ), 고객화의 정도 )3. JIT Environment. ․ Process focus. : Process focus is based on the similarity of process. For example, automobile manufacturers specialize in assembling automobiles. ( 공정의 유사성 – ex) 자동차 조립 전문 제조 ) ․ Focused factory.( 특성화된 작업장 ) : A factory specializes in narrow product mix for a niche market.( 틈새시장 ) : 전문화된 공정은 복잡한 공정보다 더 효율적이고 경제적이다 . : The focused factory may be a factory within a factory,“ (PWP- 공장 내 공장 ) an area in an ry, especially work-in-process. ․ Delayed deliveries. ․ Poor performance. - TPM Definition : Preventive maintenance plus continuing efforts to adapt, modify, and refine equipment to increase flexibility, reduce material handling, and promote continuous flow. - TPM starts with daily inspections, lubrication, and cleanup. 어떤 상황에서 최상의 조건이 될 수 있는지 이해 - 평상시에 규칙적인 예방정비가 가능 3. JIT Environment.5S 1. Sort ( Seiri ) : eliminate whatever is not needed 불필요한 쓰레기나 장비 치우기 2. Straighten ( Seiton ) : organize the work space 장비나 기계 원래 자리로 복구 3. Shine ( Seiso ) : clean the work space 작업장 청소 4. Standardization ( Seiketsu ) : 정리 정돈 청결을 유지하는 것 작업의 표준화 5. Sustain ( Shitsuke ) : regular audits and reviews 계속적 유지 계속적인 개선 3. JIT Environment.4. Uninterrupted Flow( 끊임 없는 흐름 ) ▪ Uniform plant loading.( 일정한 부하 ) - The work done at each workstation should take about the same time. - In repetitive manufacturing, this is called balancing the line. - The results will be no bottlenecks and no buildup of work-in-process nt Work Center 1 Work Center 2 4. Uninterrupted FlowNumber of Kanban Cards DT ( 1 + x ) y = C y = the number of Kanbans D = the demand per unit of time T = lead time to replace container x = a safety factor C = the container size ( 유닛수 ) 문제 . D( 시간당 수요 ) : 2000 개 , T( 리드타임 ) : 2 시간 X(Safety factor) : 4.0, C( 컨터네이너안 유닛수 ) : 700 개 칸반 카드 몇 개 ???? 2000 X 2( 1 + 4.0 ) = 700 = 8 장 4. Uninterrupted FlowKanban system 4. Uninterrupted Flow Kanban system 은 재고관리 시스템이 아니다 Kanban 은 일정계획을 하는 시스템이다 . ( 언제 무엇을 얼마만큼 어디에 만들어둬야지 ?)▪ Valid schedules The company makes some of everything each day in the proportions( 비율 ) to meet demand. Inventories are at minimum. This is called mixed-model scheduling. 주당 생산 요구량 – 1 주에 E : 500 개 , S : 600 개 , D : 400 개 2 주에 E : 500 개 , S : 600 개 , D : 400 개 3 주에 E : 500 개 , S : 600 개 , D : 400 개 합계 : E 1500 개 , S : 1800 개 , D : 1200 개 4. Uninterrupted Flow Figure 7. MPS In the old way 1500 E – 1500 S – 300 S – 1200 D SETUP 감소 작업효율성 증가 안전재고가 없다면 요구수량 변동 시 재고가 증가하거나 STOCKOUT▪ufacturing Planning and Control in a JIT Environment. Week 1 2 3 4 5 Gross requirement 25 0 15 20 30 Scheduled receipts 50 Projected available(10) 35 35 20 0 20 Net requirements 30 Planned order Receipt 50 Planned order Release 50 DAY 13 14 15 16 17 Gross requirement 25 0 15 20 30 Scheduled receipts 50 Projected available(10) 35 35 20 0 20 Net requirements 30 Planned order Receipt 50 Planned order Release 502. In a pure JIT environment, there is no inventory on hand , and the order quantity logic is to make exactly what is needed. Therefore, there is no netting required . 5. Manufacturing Planning and Control in a JIT Environment. Week 1 2 3 4 5 Gross requirement 25 0 15 30 30 Scheduled receipts 50 Projected available(10) 35 35 20 40 10 Net requirements 10 Planned order Receipt 50 Planned order Release 50 Item : A Order Quantity : 50 Units On-Hand Balance : 10 Safety Stock : 0 Allocated Qty : 0 Lead Time : 1 Week Low Level Code : 1 Week 1 2 3 4 5 Gross requirement 25 0 15 30 30 Schedulw}

경영/경제| 2010.11.20| 49페이지| 2,000원| 조회(123)

생산관리, JIT, 칸반, PULL시스템

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