Stage order [& definition if needed]
Launch [>100m elevation gain]
Max Q
Main Engine Cut-Off (MECO)
Stage Separation
Second Stage Ignition
Booster Boostback Burn
Second Stage Engine Cutoff (SECO)
Booster Ocean Landing
Second Stage Landing
For all of the above stages, Starship has to complete the stage successfully before failing. For example, if the second stage separates succesfully but then the engines fail to light, this resolves to "stage separation".
Failure is defined as anything that prevents the second stage from executing the planned mission profile. Loss of the booster after separation is not considered a failure for the overall mission. If things get hairy but the second stage limps its way to the desired target, I'll call that a success.
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Looks like the second stage didn't quite make it to SECO, so resolving this to "Second Stage Ignition"
@Mqrius I'm calling failure based on the second stage, so if the booster fails during boostback but second stage continues on, then the second stage successfully made it through the boostback stage. If the second stage lights, then the booster successfully does boostback, then the second stage explodes before SECO, I would resolve that to "Boostback".
@Berg I will resolve that to "Second Stage Landing", as it made it to that stage without failing. Good point that it could go entirely without failure.