Why the mean is the wrong forecast, and what to train instead
Metric designHardProblem. Your team trains forecasting models by minimizing mean squared error. A colleague points out that the ordering system reads the forecast and orders that many units. Is MSE the right objective? If not, what is?
Before you reveal: say your answer out loud, as if you were in the real interview — get your reasoning across clearly first. There is no single correct answer: reading what the interviewer is really after and defending your own thinking is what makes an answer strong.