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JIT(JUST IN TIME)

 What is the objective?

To achieve zero inventory in APTICS dictionary. JIT is defined as," A philosophy of manufacturing based on elimination of all waste and continuous improvement of productivity."

APICS-

        "American production of inventory control and society"

JIT is also defined as an approach with objective of producing a right part in right time  at right place.
JIT was developed by TOYOTA in 1950.(1950-1970).

1980 - GEC (General electric company)

Country-USA


OTHER NAMES OF JIT-

  1. Toyota production system
  2. Lean production
  3. Stockless production

Elements of JIT-

  • Stabilize and level the MPS with uniform plant loading (Heijunka).
  • Reduce set up time(Ex- Nascar pit screw)
  • Reduce lot size
  • Preventive maintenance 
  • Reduce lead time
  • Flexible workplace-Respect for people
  • Require supplier quality assurance and implement a zero defect quality program (JIDOKA)


QAT - Quality at Source

M.P.S. - Master Production System

Advantage of JIT- 

  • Less inventory
  • Minimum waste
  • Less space required
  • Improve working relation between  employees
  • Increased Flexibility .
  • Higher productivity and lower cost
  • Improve quality
  • Stronger and more reliable working relation with supplier

Disadvantages-

  • Risk of running out of stock
  • Lack of control over time frame
  • Some extra planning and documentation are required 
  • Loss of individual autonomy
  • JIT is effective only when the daily demands are fairly stable. 


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