The discount coefficient of supervision bid-winning refers to the preferential discount provided by the tendering unit for winning the bid in the process of supervision bidding.

The discount coefficient is usually less than 1, indicating that the bidder is willing to lower the original bid price in order to win the bid. For example, a discount factor of 0.9 indicates that the bidder is willing to undertake the supervision project at the price of 90% of the original bid price.

This coefficient is the product of negotiation between the bidder and the tenderer, which usually involves the interests and risk considerations of both parties.