At this point, you've tested the repair or resolution that was made to alleviate the problem and it's time to fully test the functionality of the full system and, if appropriate, the interaction of the system with any devices with which it interacts. Preferably, the assigned user, a supervisor, or a knowledgeable stakeholder should do this testing. Should this test fail at any level, document the point of failure and restart the entire troubleshooting process, focusing on the new failure.
If the testing is successful and the system functions as it should, determine whether there are any possible preventive measures that could help to avoid the same or similar failures in the future. These preventive measures may be as simple as improvements to the backup procedures or adjusting the Heating, Ventilating, and Air Conditioning (HVAC) system, or as...