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.
A key aspect of determining the impact of a disruption is identifying what BS 25999 calls the maximum tolerable period of disruption (MTPOD). BS 25999 defines MTPOD as the duration after which an organization's viability will be irrevocably threatened if product and service delivery cannot be resumed..