In construction management and quantity surveying, a Bill of Quantities is a vital contractual document detailing material, labor, and operational costs, generally split into two primary types based on pricing structure. The first type is the bill of quantities with quantities and rates provided, known as a standard or priced BOQ, where contractors review pre-calculated material volumes and insert their monetary rates to compute the total project bid. The second type is the approximate quantities bill, frequently utilized in fast-track or civil engineering projects where detailed architectural designs are incomplete, requiring contractors to price estimated provisional sums that are later adjusted based on final measurements taken upon completion of the physical building construction phases.