Abstract
A sale decision method and a sale request evaluation method are disclosed to increase the revenue by selling available products. The sale decision method is applied in a sale decision system that includes an input module, a database module, a decision computation module, and an output module. The sale decision method comprises a sale request receiving process, a sale decision making process, and a sale decision output process. The input module receives a sale request, the decision computation module produces a sale decision, and the output module outputs the sale decision. In addition, the sale request evaluation method is applied in a sale request evaluation system that includes an input module, a database module, a sale request evaluation module, and an output module to determine the quotation of price for a sale request.