This document discusses sales forecasting methods. It defines sales forecasting as estimating future sales according to a proposed business plan. There are qualitative and quantitative methods. Qualitative methods rely on human expertise and include jury of executive opinion and sales force opinion. Quantitative methods include time-series analysis using trend, seasonal, and cyclical analysis, as well as causal methods like regression analysis. Accurate forecasting allows businesses to systematically plan production levels and cut wasteful spending.