TQI must be started on each processor from which users submit commands and file-to-file transactions in order for the commands and transactions to be checkpointed. TQI must also be started in order for users to receive BDT messages. TQI may be started in either of two ways:

• Automatically during initialization of the MVS base control program. To do this, include a START command for TQI in the COMMNDxx member of SYS1.PARMLIB.
• Manually by the operator. To do this, issue the MVS START command. Note that if some time later TQI restarts automatically, any user parameters that the operator may have included on the START command are lost.