Your add-ins should create no delay in Outlook shutdown that is perceptible to the user. Compare the time it takes for Outlook to shut down with only your add-in running, and the time it takes for Outlook to shut down without any add-ins running to identify any significant difference.
Reportable Event: A Reportable Event is a process (with an associated IRB form) used by an investigator to report any problem or event or other act or omission to the irb.
Overload means an excess current drawn, which will lead to tripping of the circuit breaker once the current exceeds 5 times the rated MCB current value within a tenth of a second (depending on the Type of MCB). When your electric load is faulty and there's a short circuit, a lot of current is drawn -> MCB trips. But an electric shock to a human being may not always draw an excessive current that is so high to trip the MCB and protect you. This is where RCCB comes in.