IQ/OQ for existing equipment differs from that conducted for new equipment. For existing
equipment the IQ documents what is currently installed in the facility. It would not be expected to
go back to when the equipment was originally installed and document what was done. There’s
really no need to do the OQ because the OQ would be the historical data that you’ve generated
with the use of that equipment over the years, demonstrating that that equipment is working
satisfactorily.
