Example answer
216 words, about 1 min 26 s
Answer to “Tell me about a time you failed.” Invented story.
About the right length.
Situation
Last spring I led a four-person team in my university's consulting club, working for a regional bakery chain with eight stores. Ten days before the final presentation, I found that our sales forecast counted catering orders twice.
Task
I owned the forecast, and the owner was about to decide on a ninth store based on it, so the number had to be right before we presented.
Action
I told my team the same day and we split the rebuild. I redid the forecast, one teammate checked the old order data against the chain's receipts, and another rewrote the slides. I also emailed the owner before the presentation to say the number would change, instead of letting him find out in the room. Then I set a rule for the team: a second person checks every number in a deck against the source data before it goes out, and I wrote it into our project checklist.
Result
We presented a corrected forecast about a fifth lower that still supported a ninth store, a smaller one. The owner said the early warning made him trust the rest of the deck, and he hired us for a pricing project. What I took from it is to tell people early when a number is wrong, and to build the check into the process.