Sometimes there’s no way to review it after the fact, and that’s part of why Q7A put in the
allowance for electronic or other means of verifying the critical steps. For example, if you’re
adding a liquid, you may have a printout for your mass flow meter as to how much liquid went in.
That together with what the knowledge of what was actually hooked up can be your second
verification. So you need to have some justification if it is a critical step and you’re not doing a
review at the time.
