Blog.

Forecast accuracy is one of those areas that seems straightforward until you try to apply it consistently. Most people start with a basic metric, often MAPE or RMSE, because that’s what their software provides, or because it’s easy to explain. But over time, the limitations start to show. The same model performs well under one metric and poorly under another. Different teams prefer different measures. Some products look accurate, while others clearly aren’t, even though they