TOPIC 6 (WEEK 7)
ADVANTAGE OF JUST IN TIME (JIT)
Just-in-time inventory systems, pioneered by Toyota, move
inventory through a production system under a pull ideology, with customer
orders pulling the inventory through the system. Production begins with a
customer order and the order is moved through production with visual symbols,
called Kanban, that tell workers to start making the next part. While
just-in-time has many advantages, it is important to know that the system has
weaknesses as well. Examples of the companies that implement the JIT production
such as TOYOTA.
By using just-in-time concepts, there is a greatly reduced
need for raw materials and work-in-process, while finished goods inventories
should be close to non-existent. Just-in-time inventory has the following
advantages:
There should be minimal amounts of inventory obsolescence,
since the high rate of inventory turnover keeps any items from becoming old.
Since production runs are very short, it is easier to stop
the production of one product type and switch to a different product to meet
changes in customer demand.
The very low inventory levels mean that inventory holding
costs are minimized such as warehouse space.
The company is investing far less cash in its inventory,
since less inventory is needed.
Less inventory can be damaged within the company, since it
is not held long enough for storage-related accidents to arise.
Production mistakes can be spotted more quickly and
corrected, which results in fewer products being produced that contain defects.
DISADVANTAGE OF JUST
IN TIME (JIT)
Despite the magnitude of the preceding advantages, there are
also some disadvantages associated with just-in-time inventory, which are:
A supplier that does not deliver goods to the company
exactly on time and in the correct amounts could seriously impact the production
process.
A natural disaster could interfere with the flow of goods to
the company from suppliers, which could halt production almost at once.
An investment should be made in information technology to
link the computer systems of the company and its suppliers, so that they can
coordinate the delivery of parts and materials.
A company may not be able to immediately meet the
requirements of a massive and unexpected order, since it has few or no stocks
of finished goods.