Interviewers ask about failure to understand accountability and learning, not to collect dramatic confessions. The best answer is neither blame nor a disguised success story.
Choose an example with a real consequence and a decision you can examine. State the outcome plainly. Explain the assumptions or signals you missed. Then show the corrective action and the later evidence that the lesson persisted.
Name the failure accurately
A missed target, unreliable release, wrong prioritization, unclear handoff, or abandoned approach can all work. Avoid exaggerating the consequence to make the story memorable.
Separate responsibility from total control
Own the decisions and communication that were yours. You can name external constraints without using them to erase your responsibility.
Explain the correction
Describe the immediate response: narrowing scope, communicating risk, rolling back, adding a verification step, or changing the plan. The correction should fit the failure rather than becoming a generic lesson.
Prove the lesson traveled
The strongest close names a later decision that changed because of the failure. This is better evidence of learning than saying you became more careful.