Your question is Ensuring Reproducibility in an Accredited Lab. Take a moment with it on the right.
Talk me through your thinking if you like. When you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes).
Tell me about a time you discovered a risk to data accuracy or reproducibility in an accredited laboratory workflow. How did you investigate it, correct it, document it, and make sure the issue would not recur?