We’re excited to announce that you can now measure the accuracy of forecasts for individual items in Amazon Forecast, allowing you to better understand your forecasting model’s performance for the items that most impact your business. Improving forecast accuracy for specific items—such as those with higher prices or higher costs—is often more important than optimizing for all items. With this launch, you can now view accuracy for individual items and export forecasts generated during training. This information allows you to better interpret results by easily comparing performance against observed historical demand, aggregating accuracy metrics across custom sets of SKUs or time periods, or visualizing results without needing to hold out a separate validation dataset. From there, you can tailor your experiments to further optimize accuracy for items significant for your needs.
Source:: Amazon AWS