"Also, you should find someone willing to take personal responsibility."
I strongly disagree here. I always hate this scapegoating behavior, and also it irks me when for some public disasters a random person gets fired and then supposedly everything has been amended. I don't care about the people about your company, I just want you to not screw up. On the other hand, everybody makes mistakes.
I agree - sort of. A company should always present a unified front, and no one person should be asked to sacrifice himself (or herself) because of a problem.
Internally, however, you have to make sure you have processes in place to find out what happened so that if someone was responsible, you can figure out where they went wrong and teach them the procedures that will prevent the problem from happening again (this assumes that the person or people weren't willfully causing the problem, of course).
I strongly disagree here. I always hate this scapegoating behavior, and also it irks me when for some public disasters a random person gets fired and then supposedly everything has been amended. I don't care about the people about your company, I just want you to not screw up. On the other hand, everybody makes mistakes.