Although the following thread from the official
misc@ mailing list does not specifically address
"business usage" directly, it does discusses the upgrade process in regards to all OpenBSD flavors
(see Section 5.1 of the FAQ for more on flavors...).
How OpenBSD can be used
(& updated) in the business environment workflow is critical knowledge, & this thread gives the views of a number of project developers:
http://marc.info/?t=139947804000003&r=1&w=2