The document discusses methods of short term, medium term, and long term load forecasting. It explains that load forecasts help electric utilities make important planning decisions. Short term forecasts are from 1 hour to 1 week, medium from 1 week to 1 year, and long term over 1 year. Factors that influence forecasts include time, weather, customer classes, historical load data, economic data, and appliance characteristics. Common forecasting methods include regression models, time series, neural networks, and end-use or econometric approaches. Accurate load forecasting is essential for utility operation and planning.