The bill - of - quantity model adapts marketable economy and makes project contractors free bidding . this model by means of competence to form the price is catering to international regulations and symbolizing the improvement of price management system in china 工程量清单计价模式是一种与市场经济相适应，允许工程承包单位自主报价、通过市场竞争确定工程价格的计价模式，同时也是与国际惯例接轨的计价模式。
