Teknik Industri

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Just-in-time (JIT) System
Lean and fast production system
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World Class Manufacturing

• High quality
• Low costs
• Fast delivery

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TIME-BASED COMPETITION
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TWO TYPES OF PRODUCTION SYSTEM

1. PRODUCE TO STOCK OR FORECAST OR ACCORDING TO
   CAPACITY (PUSH TYPE)
2. PRODUCE ACCORDING TO ORDER OR DEMAND (PULL TYPE)

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Just-in-time (JIT) pull system produce
according to demand
Just-in-case (JIC) push system produce
according to capacity
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Just-in-time (JIT) System
Lean and fast production system
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Just-in-time rules 1) Never send defects
to the next process. 2) The next process
gets only what it needs from the prior
process. 3) Produce only the quantity taken by
the next process.
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SERVING EXTERNAL AND INTERNAL CUSTOMERS
EXTERNAL CUSTOMERS
1
Customer Service
INTERNAL CUSTOMER INTERNAL
CUSTOMER INTERNAL CUSTOMER
2
PPC
3
Purchasing
SUPPLIERS
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accept create pass on
Do not defects.
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JIC
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worker A
JIC
worker B
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A
120 cars 10 workers
20 productivity increase
100 cars 10 workers
B
100 cars 8 workers
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January
February
March
April
Conventional Production
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Mass Customization
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TRADITIONAL VS. PARTNERING PURCHASING
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Supplier Partnership and Development
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B1
B2
B3
B4
B1
B2
B3
B4
S3
S4
S1
S2
S3
S4
S1
S2
conventional
sole-sourcing
CUSTOMER-SUPPLIER PARTNERSHIP
B1
B2
B3
B4
B1
B2
B3
B4
S3
S4
S3
S4
S1
S2
S1
S2
one-to-one
supplier reduction
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SET-UP TIME REDUCTION

• COUNTRY MACHINE BEFORE AFTER
• FEDERAL U.S.A. MILLING 2 HRS. 2 MINS.
• MOGUL MACHINE
• H.WEIDMANN SWITZERLAND PLASTIC 2.5 HRS 6.6 MINS
• MOLDING
• MITSUBISHI JAPAN BORING 24 HRS. 2.6 MINS
• HEAVY MACINE
• TOYOTA JAPAN BOLT 8 HRS. 58 SECS.
• MOTOR

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Benefits of JIT

• cycle time, throughput time (down)
• inventories, lot/batch sizes (down)
• set-up time (down)
• variety (up)
• quality (up)
• costs (down)
• teamwork (up)
• supplier relationship (up)

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World Class Manufacturing Checklistrate 1(worst)
to 5 (best)

1. short predictable lead times
2. low reject rates and rework, few inspection
   especially in downstream operations
3. low inventories (WIP, FG, RM) due to pull
   production
4. short set-up time, flexible manufacturing
   (multi-model production)
5. good preventive maintenance, low machine downtime
6. multi-skilled, empowered workers, good teamwork
7. continuous improvement program
8. good housekeeping (5S)