4.1 Sales for the ensuing year shall be based on the past trend. Suitable adjustments shall be undertaken to reflect the effect of known and measurable changes with respect to number of consumers, the connected load.· and the energy consumption. Such changes may include the Petitiioner's plan for1 expansion of capacity, change in operating conditions and consumers' price elasticity of demand.
4.2 The energy requirement for each consumer category for the ensuing year shall be determined taking into account the trend growth rates for average specific consumption and the forecasted number of consumers.
4.3 The petitioner may also use econometric modelling incorporating different economic factors affecting the demand for forecasting the sales estimated.
4.4 Sales may also be forecasted on monthly basis to better reflect the • influence of seasonality.