Sensitive updates should happen outside of peak usage times, to minimize
the potential impact and to give you time to discover and rectify any problems
before they affect your customers. Peak usage times may vary, depending on
who your customers are. If you work at an e-commerce site that is used
primarily by the public in the evenings and on the weekends, the best time
for making changes may be at 9 AM. Sensitive updates also should not be
immediately followed by the person who made the change going home for
the evening or the weekend. If you make a sensitive change, stay around for