What is loop testing during commissioning of a plant and how it is done?

LOOP TESTING IS BASICALLY WIRING HEALTH CHECK AND VERIFICATION OF TAGG IN CONTROL ROOM, 

WE INITIATE AND ALARM , OR TRIP, BY OPENING WIRE OR CLOSING CONTACT BY JUMPER FALSE AND THEN CHECK OPERATES THE LOGIC AND SHOW ALARM IN CONTROL ROOM AND RECORD ON EVENT AND CREATE TRIP , SO IT IS CONFIRMED THE OUR LOOP IS OK, AND NAME OF APPEARING ALARM OR TRIP IS CORRECT,