Since July, it gets hotter and hotter these days. home appliance comes a busy season for lots of manufacturers in air conditioner and refrigeration parts. Most of home appliance suppliers have to make some finished units in stock for the rest of this year and the sales plan of next year. Otherwise, it is too late to release the orders for the production during the course of busy season, it’s not reasonable, too. We have to make a plan for the sales forecasting. According to the forecasting, we need to make some raw materials in stock so that the production delivery is same step as the market requirements, which is helpful to estimate the market insulation reports.