Quote Originally Posted by AsGryffynn View Post
I do percentages, they are less misleading...

Also, the Atlas V record is impressive, but then you take into account the fact they have experiences errors and anomalous malfunctions into account and you realoze it's more of a fact that the errors were noticed before launch and the sequence was aborted.

Those rockets are grounded for a reason.

And Delta II and III aren't good...

So, a summary...

Reliability of space launch systems...

  • Atlas V ~ 99%
  • Soyuz ~ 97.4%
  • Falcon 9 ~ 96.7%
  • Delta II and III ~ 92%

https://en.wikipedia.org/wiki/Falcon_9#Reliability

Of note is that the post-Soviet Soyuz MG rockets are actually more reliable than the former systems. Until the mission in this thread, it had completed 64 missions with zero failures in between.

Seems they are more reliable and not less...
How far back does this reliability data go for the Soyuz and other platforms that have been around for decades? Are you using the history of each space launch system in it's entirety, or are you just going back the past 15-20 years for all them and then calculating their reliability percentages?