For 8.5 It's over here: https://docs.bmc.com/docs/display/public/bsa85/Upgrade+cheat+sheet+for+BMC+Server+Automation
For 8.6, not using the UPI: https://docs.bmc.com/docs/display/public/bsa86/Upgrade+cheat+sheet+for+BMC+Server+Automation+components
and has the key steps to successfully upgrading a BladeLogic environment, including command lines, common responses, sample values, and a couple of important follow-on steps commonly missed. Check it out, especially if you're planning an upgrade. Thanks to John O'Toole for the pointer to the doc.