This is subject to the quality of the resources and those employing them. This question seems almost rhetorical.

He /She should have whole information about there organization .

And what quality of product they make & how to maintain the quality of a product these training should be given to the new employe

Hon Man John Chui has written:

'The criteria employed in writing and judging the quality of written texts'

The correct sentence would be "employed at." For example, "She is employed at the bank."

The prefix of "employed" is "em-".