Just-In-Time (JIT) Manufacturing is a methodology aimed at reducing flow times and response times. It originated from Toyota's production system and involves supplying components as needed through kanban cards. Components do not sit idle waiting for the next process. JIT has been applied in automotive assembly, computer assembly, and meal delivery systems. While often attributed to post-WWII Japan, some argue it originated in 1890s India with the Dubbawallah meal delivery system in Mumbai. JIT helps reduce waste through techniques applied from production to customers.

1. Just-In-Time (JIT) Manufacturing:
What? Where? When?
Rahul Iyer, ASQ CQE
October 2015
Mesa AZ USA

2. Introduction to Just-In-Time (JIT)
Manufacturing
What is JIT?
History of JIT
Application of JIT

3. What is JIT?

JIT-Just In Time Manufacturing-a methodology aimed
primarily at reducing flow times within production as well
as response times from suppliers and to customers

Can be attributed to Toyota Production Systems
(TPS), and Lean Manufacturing methodology

Can include the use of kanban:

a Japanese manufacturing system in which the
supply of components is regulated through the
use of a card displaying a sequence of
specifications and instructions, sent along the
production line.

Components and goods do not “sit around” too long in
holding area waiting for next step in process

4. What is JIT? (Cont'd)
Graphical Description
of a Kanban
Diagram of a JIT
Manufacturing
Operation

5. History of JIT
Not exactly clear as to when developed
Traditionally Attributed to Post WW II Japan: developed &
implemented at Toyota --Ohno, Taiichi (1988), Just-In-Time
for Today and Tomorrow, Productivity Press, ISBN 0-
915299-20-8.
Could be argued that it was developed in 1890 in Bombay
by Mahadeo Havaji Bachche, when he setup the
Dubbawallah System--Ravichandran, N (2005), World Class
Logistics Operations: The Case Of The Bombay
Dubbawallahs, Ahmedabad: Indian Institute of
Management.

6. History of JIT
What is a Dubbawallah?
– is a person in India, most commonly in Mumbai, who is part
of a delivery system that collects hot food in lunch boxes
from the residences of workers in the late morning, delivers
the lunches to the workplace, predominantly using bicycles
and the railway trains, and returns the empty boxes to the
worker's residence that afternoon. They are also made use
of by meal suppliers in Mumbai where they ferry ready,
cooked meals from central kitchens to the customers and
back.

7. Application of JIT

Assembly of automobiles
(Toyota, Honda, Nissan,
Harley Davidson)

Assembly of Computers
(Dell)

Meal Delivery Systems
(Mumbai Dubbawallah,
Airline meals)

8. Conclusion

JIT-Just In Time Manufacturing is a methodology that
has been adopted across many industries

It helps to reduce waste & many techniques have been
applied for it

It is not a new idea, dating back to the 1890s in India, or
Post WW II in Japan

It is increasingly becoming part of our lives each day.