(1) Multiple-stage pricing characteristic.
(2) Single-piece pricing characteristic.
① Investment estimation, which refers to the process of preliminarily calculating and determining the required investment for a proposed project during the project proposal and feasibility study stages by preparing an estimation document. It can also represent the estimated investment amount of the construction project, or be referred to as the estimated cost;
② Design estimate, which refers to the preliminary calculation and determination of the construction cost during the preliminary design stage according to the design intent by preparing an engineering estimate document;
③ Construction drawing budget, which refers to the preliminary calculation and determination of the construction cost during the construction drawing design stage by preparing a budget document based on the construction drawings.
(3) Composite characteristic.