When the service fails.
WHAT TO ESTABLISH FIRST
Whether it is the provider or you.
Check their status page, and check from another connection.
WHAT YOU CAN DO
Very little about the outage itself.
WHAT YOU CAN DO ABOUT THE CONSEQUENCES
Tell affected people promptly Switch to a fallback, if you have one Continue what can be done offline
WHAT TO PREPARE IN ADVANCE
Which services you depend on What you would do without each How you would tell customers
THE COMMUNICATION POINT
If the outage affects your customers, tell them before they discover it.
WHAT NOT TO DO
Make configuration changes in response to someone else's outage
That produces a second problem to fix afterwards.
WHAT TO RECORD
Start and end times, and the effect on you.
WHY
For any claim, and for your own assessment of the provider.
WHAT TO REVIEW AFTERWARDS
Whether your dependence is acceptable Whether a fallback is warranted
