Toyota developed just-in-time (JIT) manufacturing in the 1970s-1980s to improve quality and reduce costs. JIT aims to eliminate waste by providing the right parts at the right time and place. It is a philosophy of continuous problem-solving that pulls supplies through production as needed. Key elements include acquiring inventory as needed, improving quality, reducing lead times, and daily revisions. JIT seeks to reduce waste and variability for low-cost, high-quality production through a pull-based system with small lot sizes and close supplier ties.

2. INTRODUCTION:-
∙ During 1970s and 1980s JIT was
developed by Japanese company,Toyoto
to achieve product quality at minimum
cost.
∙ After world war 2,manufacturing co. faced
challenges of increasing the speed to fulfill the
customer needs with quality and less cost.
∙ JIT PHILOSOPHY-known as philosophy coz it
goes beyond inventory control and includes
full production system.

3. “just in time is an approach that seeks to
eliminate all sources of waste in production
activities by providing the right
part at right time and at right place”.
∙ A philosophy of continuous and forced
problem solving.
∙ Supplies and components are “pulled” through
this system where needed.
∙ Add value by driving out waste.
∙ No excess time and inventory.
∙ Rapid response and low cost.

4. ELEMENTS:-
1. To acquire inventory when needed.
2. Improve qualities to zero defects.
3. Reduce lead time by reducing set-up
times ,queue lengths and lot sizes.
4. To revise operations daily.
5. Cost minimizing factor.
6. Involvement of people.

5. Concepts of JIT:-
1. Elimination Of waste and variability.
2. ‟PULL‟ versus „PUSH‟ system.
3. Manufacturing cycle time.

6.  WASTE REDUCTION:-
.Anything that does not add value.
.products being stored, delayed,
products waiting in queue and defectives..
 VARIABILITY REDUCTION:-
.Due to internal and external factors.
.Is any deviation from the optimum process
that delivers perfect product on time.

7. . JUST IN TIME is pull system as material
Is supplied only when requested and needed.
. PUSH SYSTEM- A system that pushes
materials into downstream work stations
regardless of their need or availability of
resources to perform work.

8. .Time between the arrival of raw material
and shipping of finished material
JUST IN TIME helps reducing it.
OTHER NAMES:-
1.ZERO INVENTORY
2.SYNCHRONOUS MANUFACTURING.
3.MATERIAL AS NEEDED.

9.  Produce according to customer needs.
 Produce as quickly as customer wants.
 Produce perfect quality.
 Produce in minimum lead times.
 Produce product with features that customer
wants.
 Produce with no waste of labour, material
or equipment.

10.  1.PULL METHOD OF MATERIAL FLOW:-
system that pulls a unit to where it is
needed just as it is needed.
 2.CONSISTENT HIGH QUALITY:-
Eliminate scrap and achieve uniform
flow.
Implementation of behavioral and
statistical methods of TQM.

11. 3.SMALL LOT SIZES:-
Rather building up of inventory
JIT system maintain inventory
with small lot size.
4.UNIFORM WORK LOAD:-
Assembling the small type and
number of products each day.
5.STANDERDISED COMPONENTS:-
Achieve high productivity and
low inventory.
Repetitive production situation.

12. 6.CLOSE SUPPLIER TIES:-
Close relationship with suppliers
enable to operate with low level of
inventories.
7.FLEXIBLE WORK FORCE:-
Workers with multiskills trained to
perform more than one job.
8.AUTOMATED PRODUCTION:-
Low cost production.
greater profits.
greater market share.

13.  Good quality products.
 Fastest response time.
 Lowest cost.
 Work as competitive advantage.
 Timeliness.
 Full utilization of resources and workers.
 Improved production process.

14.  JIT DEMAND DISCIPLINE-on time, no defects.
 BASED ON COOPERATION-no suspicion or
distrust in suppliers, managers, workers.
 AMBIGOUS-different managers think
differently.
 EXPENSIVE-training cost, preventive
maintenance, consulting cost.
 STRESS ON SHOP WORKERS.
 TIMELY SETUPS-short setups and frequent
shipments and receipts.