Determination of Comprehensive Unit Price of Variation Using Cost Plus Profit Principle

Though cost plus profit principle has become the main principle that the supervisor holds to determine comprehensive unit price of item of variation of project (hereinafter referred to as CUPIVP) with no specified or similar work unit price, there is no clear and concrete operation method for this evaluation principle, which leads to the difficulties in the practice and causes disputes on payment. This study focuses on the ambiguity of the content and calculation method of cost plus profit in this evaluation principle, defines the structure of comprehensive unit price of varied work, and puts forward a method for cost, profit and falling rate calculation.