In this production process, the manufacturer arranges for materials to arrive at production facilities just in time to enter the manufacturing process. materials and parts don't sit unused for long periods of time - costing space and tying up money. what is it called?

just-in-time (JIT) production

Explanation:

One strategy is called just-in-time (JIT) production: the producer organises for products to reach the manufacturing process just in time to reach at the production facilities. Components and materials are not unused for extended periods of time, and stock "holding" costs are greatly reduced.

However effective contact and coordination between the producer and the supplier is necessary for this process

answer; researchers typically cannot control people's sexual behaviors as would be necessary in an experiment;

think its caste system

explanation: