Moving systems.
WHAT TO ESTABLISH
What the application depends on Whether the target supports it What data must move What downtime is acceptable
WHAT TO TEST FIRST
The application running in the new environment, before any switch.
WHAT TO PREPARE
A copy in the new location A tested restore path A rollback plan
THE ROLLBACK POINT
Always know how to return to the previous arrangement.
WHAT TO PLAN
The sequence Who does what How you verify When you decide to proceed or revert
WHAT TO DO ABOUT DATA THAT CHANGES
Either accept a freeze during the move, or synchronise.
WHAT TO VERIFY AFTERWARDS
Every function, not only the homepage Integrations Scheduled tasks Mail sending
THOSE LAST TWO
Frequently forgotten and frequently broken.
WHAT TO MONITOR
Closely, for the first days.
WHAT TO KEEP
The old environment, until confidence is established.
