This is a generic question for any position.
Sample answer is:
In my work, I follow the rule of Do not make perfect the enemy of good. I take extra steps to deliver things with high quality but I do it within the deadline for that deliverable. At times, I make mistakes also. My approach for each mistake is to identify the ways to prevent it from happening again. For this I analyze it from different points of view and implement practices by which I can minimize mistakes of that kind in future.