Project Cost Estimation & Tenders Services

Estimation and costing define the expected investment required to design, procure, and construct a facility. It includes quantification of materials, labor, equipment, and indirect costs to assess the total project value and economic feasibility before execution.

Accurate estimation ensures budget control, resource planning, and investment decisions. It also forms the foundation for project financing, tender evaluation, and risk management throughout the engineering and construction phases.

• Preliminary Estimate: Rough figure used during concept or feasibility stage (accuracy ±30–40%).

• Budgetary Estimate: Based on FEED data with improved accuracy (±15–20%).

• Detailed Estimate: Derived from full BOQ and engineering drawings (±5–10% accuracy), used for tendering and contract award.

The BOQ (Bill of Quantities) lists all measurable quantities of materials, components, and work activities needed for the project. It allows bidders to price uniformly, ensuring transparency and comparability during tender evaluation.

The Schedule of Rates (SOR) provides standardized unit rates for construction materials, labor, and services, typically issued by government departments or organizations. It serves as a reference baseline for cost estimation, budgeting, and rate analysis.

A comprehensive cost estimate typically includes:

• Direct costs: Materials, labor, equipment

• Indirect costs: Supervision, testing, QA/QC

• Contingencies and escalation

• Taxes, duties, and freight

• Contractor overheads and profit margins

During FEED, estimates are based on design data, preliminary MTOs, and vendor quotes for major equipment.
During Detailed Engineering, estimates are refined using final BOQs, vendor quotations, fabrication data, and actual construction inputs for higher accuracy.

The tendering process typically involves:

1. Preparation of tender documents (BOQ, specs, drawings)

2. Floating of tenders (EPC or package-wise)

3. Technical bid evaluation (TBE)

4. Commercial bid comparison (CBE)

5. Negotiation and recommendation for award (RFA)

Technical specifications define design standards, material grades, workmanship quality, and testing criteria. These documents ensure uniform understanding among bidders, eliminate ambiguity, and allow fair price comparison.

Standardized BOQs and SORs maintain consistency across multiple packages, reduce errors in scope definition, and simplify cost tracking and progress measurement during project execution.

Accurate estimates help procurement teams prepare budgetary requisitions, bid comparisons, and vendor negotiations, ensuring that final purchase costs align with the approved project budget.

Typical tools include:

• MS Excel / CostOS / Candy / Cleopatra Enterprise – Estimation & cost analysis

• SAP, ERP systems – Procurement & budgeting integration

• Primavera / MS Project – Schedule-linked cost control

• Digital tendering portals – Bid management & evaluation

Value engineering (VE) reviews the design and scope to optimize cost without compromising function or safety. It identifies alternate materials, modular construction options, and efficient methodologies to enhance project economics.

The cost engineer develops and updates cost models, verifies contractor submissions, manages change orders, and supports project management with real-time cost control and forecasting throughout the lifecycle.

A well-prepared cost estimate allows effective monitoring of budget vs. actuals, early identification of cost overruns, and timely corrective actions — ensuring project financial discipline and predictability.

Typical tender documents include:

• Invitation to bid (ITB)

• Instructions to bidders

• General and special conditions of contract

• Technical specifications and drawings

• BOQ and SOR

• Commercial bid format and compliance checklist

By adopting two-bid systems (technical and commercial), conducting open bid evaluations, and maintaining traceable documentation, the tendering process ensures objectivity, competitiveness, and auditability.

Challenges often include incomplete data, fluctuating material prices, scope ambiguity, and multiple vendor interfaces. Using historical data, verified benchmarks, and robust risk allowances helps overcome these uncertainties.

A validated and auditable estimate supports lenders and investors by providing CAPEX justification, cash flow projections, and project viability analysis, forming the foundation for financial closure.

A credible consultant provides:

• Proven industrial project experience

• Cross-disciplinary knowledge (civil, mechanical, E&I)

• Access to market databases and vendor networks

• Transparent methodologies and reporting formats
  Such expertise ensures accuracy, traceability, and client confidence in cost outcomes.