2, according to the contractor in the process of fulfilling the contractual obligations actually completed the calculation of quantities.
3, for the project does not meet the requirements of the contract documents, the contractor is beyond the scope of the construction drawings or rework caused by the contractor, will not be measured.
4, if found in the bill of quantities calculation deviation, and engineering changes caused by the increase or decrease of quantities, should be adjusted according to the facts, the correct measurement.