“JIT (Just in time) is an inventory management strategy employed
by the organization, to increase efficiency, reduce inventory
carrying costs, and reduce waste by getting raw material only when
required. It is possible only if demand and product forecasts are
planned with precision and accuracy.”
The JIT was invented in 1970’s and used in Japan especially by a
large automobile giant. It was initiated by the lack of natural
resources, lack of space for the inventory, and lack of cash after
the war. The two good examples are automobile giants like Toyota
who have successfully implemented JIT inventory management concept
in their manufacturing facilities, second is fast food QSR (Quick
service restaurants) Like Burger King who have all necessary
ingredient like meat, condiments, bun ready but prepare it only on
customer demand and orders, unlike places which serve readymade
sandwiches.
The two major impacts are as follows:
- Reduced inventory carrying cost by reducing waste and
increasing efficiency
- Improve in return on investment and a cost-cutting
strategy
- Reduced inventory carrying cost by reducing waste and
increasing efficiency: There is reduction in inventory
carrying cost as the raw material is not kept in stock and zero
buffer is maintained, the raw material is directly delivered to the
production line for example in case of an automobile giant
pre-specified, standardized components are received directly at the
assembly line and the vehicle is assembled in a couple of
minutes.
The only disadvantage is that in case of a stock delay the
entire line will come to a stop. This system required excellent
logistics and production planning. Toyota only places orders on
suppliers when they have orders for cars from customers.
- Improve in return on investment and a cost-cutting
strategy: The manufacturer does not maintain any stock of
raw material or finished goods, all are manufactured exactly as per
customers orders and market demand. The company can shift from one
model to another according to customer requirements. They don’t
need a warehouse to the stock raw material or finished goods which
are supplied immediately from the production line, quality checked
and dispatched to the customer. This reduces the cost of
maintaining buffers in raw material and stock up finished goods I
anticipation of future demand which can lead to obsolete and excess
stocks. The organization needs no warehousing space and also
eliminates the need to invest in the raw material. The return on
investment improves and overall costs reduced. It took 15 years for
Toyota to implement JIT inventory management system at their
manufacturing facilities from 1970 to 1985.
The success of JIT depends on the following factors:
- Excellent workmanship
- Continuous production
- Reliable and steady suppliers
- Fine-tuned production line.
Disadvantages are as follows:
- The plant shut down if supplier production is delayed.
- Huge losses as the there are no inventories so production line
will stop.
- Above two can delay deliveries and customer orders.