Real-world uses

Created for this library

1. 1.

   A retail forecasting team reports RMSE per SKU group so planners can size buffer stock against typical absolute error.

2. 2.

   A logistics team reports RMSE on delivery time predictions because squared error penalizes large misses more strongly.

3. 3.

   A pricing team uses RMSE during training but reports MAE to business reviewers because absolute units are easier to interpret.