How did the test cycle shorten the six -day long seven -A rocket?

It sounds not long in 6 days, but for the rocket launch, each job must be scrambled. Because, every time the test cycle decreases, the rocket launch efficiency has improved a big step forward. On the

From 32 to 26, how does the long seven -A rocket do?

It sounds not long in 6 days, but for the rocket launch, each job is against time,...