Just-in Time (JIT) Inventory management
JIT is a system whose purpose is to generate or to purchase products or components as they are required by customers or for use rather than for stock.
A JIT system is a pull system which responds to demand as opposed to a push system in which stocks acts as buyers between the different element of the system like purchasing, manufacture and sales.
JIT production
Is a production system, that is driven by demand for the finished products whereby each component on the production line is produced only when needed for the next stage.