This source, titled “OpEx- SCM Funda2 Forecasting.pdf” by Vishnu Rayapeddi, provides an extensive overview of demand forecasting within supply chain management. It begins by defining forecasting as educated guessing and a crucial process for business decisions across various time horizons, from short-range (under one year) to long-range (over three years). The document details different types of forecasts, including economic, technological, and demand, and outlines seven key steps in the forecasting process, from determining its use to validating results. Furthermore, the text distinguishes between qualitative forecasting methods (like the Delphi method and sales force composite) and quantitative methods (such as moving averages, exponential smoothing, and linear regression), explaining their applications and calculations, including metrics like Mean Absolute Deviation (MAD) and tracking signals for monitoring forecast accuracy.