Now with Amazon Forecast, you can seamlessly conduct what-if analyses to quantify the potential impact of business scenarios on your demand forecasts. Amazon Forecast is a fully managed service that uses machine learning (ML) algorithms to deliver highly accurate time series forecasts. Simulating hypothetical scenarios through what-if analyses is a powerful business tool to stress test your planning assumptions by capturing possible outcomes. It is a common practice to assess the impact of business decisions on revenue or profitability, quantify the risk associated with market trends, or evaluate how to respond to logistics and workforce changes to meet customer demand.