Quantity Surveying, Cost Estimation, and Documentation
This domain tests measurement (متره), pricing with the base price lists (فهرست بهای واحد پایه) issued by the Plan and Budget Organisation, progress statements (صورتوضعیت), deductions and price adjustment (تعدیل).
Core rules
- Measurement: measure from approved drawings to the item's measurement rule; deduct openings above the stated threshold; state units (m², m³, kg, number).
- Pricing: the price list gives a unit rate per item including labour, material, plant and overheads; non-listed items need a star rate (قیمت جدید) approved by the client.
- Progress statements: monthly, based on measured and accepted work; deduct advance-payment recovery, retention, insurance and taxes.
- Adjustment: applied by index ratios between the base period and the execution period, on the contractual portion of the amount, not blindly on the whole statement.
- Documentation: quantity sheets, measurement records, variation orders and delivery minutes support every figure; an unsupported figure is a dispute waiting to happen.
Worked example
A blockwork wall is 10.0 m long and 3.0 m high = 30.0 m². One window opening is 2.0 × 1.2 = 2.4 m², fully deducted → 27.6 m². At an assumed unit rate of 1,200,000 rials/m²: 27.6 × 1,200,000 = 33,120,000 rials. If the contractual adjustment index ratio for the executed period is 1.35, the adjusted amount is 33,120,000 × 1.35 = 44,712,000 rials. Show the deduction and the index ratio as separate lines - that is what an auditor checks first.
Traps
Deducting openings twice or not at all. Mixing gross and net areas. Applying the adjustment index to advance payment recovery. Certifying quantities from the contractor's own measurement sheet without independent check.