Prepare and revise BO. Q schedules according to the correct engineering method. Quantification of quantities according to approved plans of the project and contracts. Compare the quantities of the scheme with those already implemented and show any difference or change from the expected quantities to correct any shortage or increase early. Implementation of risk control, engineering value management and cost management. Preparation and analysis of bid costs. Advice on contractual claims. Evaluation of the capacity of the specialists of the parties concerned.