What is JUST IN TIME (JIT) in manufacturing?

Just in time is a method which is used in inventory control where all the essential stuff such as labour, machinery, raw materials are checked and scheduled so that when they are needed they can be arranged without any delay and begin with the production.
JIT moves materials to the right location at the right time, just before it’s needed. This increases efficiency by minimizing the space required to “hold” materials before they’re actually needed.