Billing & Estimation Prepare and verify contractor and subcontractor bills based on work completion, BOQ, and project estimates. BBS Preparation Develop and review Bar Bending Schedules (BBS) for accurate reinforcement calculations and execution. Quantity Calculation Perform quantity surveying, material reconciliation, and cost estimation for various construction activities. Measurement & Verification Verify site measurements, assess work progress, and ensure accurate billing as per project drawings. Rate Analysis & Costing Conduct rate analysis, validate cost estimates, and ensure compliance with contract terms.