2. INDEX
1.Just in time
2.Just in time layout
3.Just in time inventory
4.Lean Production.
5. Just in time in sevices
3. 1.Just in
time (JIT)
“A philosophy of continuous and forced
problem solving that drives out waste”
JIT is a key component of Lean Production
Supplies and components are “pulled” through a
system to arrive where they are needed when they are
needed
Key points:
1)WASTE REDUCTION
2)VARIABILITY REDUCTION
3) PUSH versus PULL
5. 1.2)
Variability
reduction
“Any deviation from ghe optimum process
that delivers perfect product on time, every
time”
The less variability, the less waste in the system.
Variability is caused by poor management.
It occurs because:
Incomplete or inaccurate drawings or specifications.
Poor production processes resulting in incorrect
quantities, late, or non-conforming units.
Unknown customer demands.
6. 1.3) Pull
versus Push
PULL system: a system that pulls a unit to where it
is needed just as needed.
PUSH system: a system that pushes materials into
downstream workstation regardless of their
timeliness or availability of resources to perform
the work.
8. 2. JIT
LAYOUT
“JIT layout reduces the movement of
material on a factory floor that doesn´t
add value.”
Move material directly to the location where needed
1)Distance reduction
2) Increased flexibility
3) Impact on employees.
4) Reduce space and inventory.
9. 2.1)Distance
reduction
The use of WORK CELLS appears
Often based on group technology codes
Contains several machines performing different
operations
RESULT produce one good unit at a time>>> units
are only produced after a customer order.
10. 2.2)Increase
d Flexibility
Work cells are designed to easily adapt to
changes (volume, improvement, design…)
Also applied to office environment ( furniture
and equipment movable, office walls and
telecommunications connections…)
14. 3.1 Reduce variability
Eliminate inventory that hides variability in the production
system
3.2 Reduce inventory
Remove inventory that reduces variability
3.3 Reduce Lots sizes
Producing good products in small lot sizes helps in reducing
inventory and inventory costs.
3.4 Reduce set-up costs
The way to drive down lot sizes and reduce average inventory
is to reduce set up costs which in turn lowers the optimum
order size
3. Just in
time
inventory
15. 4.Lean
Production
“A way to eliminate waste through
a focus on exactly what the
customer wants”
External focus
Analysis of activities required to production and
optimization of the entire process according to
customers.
16. A good
example:
Toyota
Productio
n System
(TPS)
4 PRINCIPLES:
1.Completely specified work
2.Customer-supplier relationship must be direct and
related information specific
3.Product and service flows simple and direct
4.Scientific method at the lowest possible level in the
organization
17. Attributes of
a lean
producer
Use of just in time techniques.
Build systems that help employees to be efficient.
Reduce space requirements.
Close relationships with suppliers.
Educate suppliers to accept responsibilities
Eliminate all but value-added activities.
Constant development of the work force
Responsibility at the lowest level ( challenging jobs)
18. Japanese
5 S’s of
lean
productio
n
Sort/segregate
Simplify/ straighten
Shine/ sweep
Standardize
Sustain/self discipline
US :
•Safety
•Support/
Maintenance
