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Chapter 5 Cost Estimating and Bidding

Chapter 5 Cost Estimating and Bidding

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Chapter 5 Cost Estimating and Bidding

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  1. Chapter 5 Cost Estimating and Bidding BCN 4708 Fall 2008

  2. Estimating and Bidding • Estimating process • Determine labor, material and equipment needs • How much subcontracting? • Assign prices to quantities • Add in: indirect costs, overhead and profit • ASPE • AACE

  3. Estimating and Bidding • Lump-sum Estimates • Unit-price Estimates • Approximate Estimates p.79 • Cost-per Function • Area Cost Estimate • Volumetric Cost Estimate • Modular Takeoff Estimate • Partial Takeoff Estimate • Panel Unit Cost Estimate • Parameter Cost Estimate

  4. Estimating and Bidding • Bidding Procedures • Private • Public • Advertisement for Bids • Private • Public • Reporting services

  5. Estimating and Bidding • Decision to Bid • Set-Asides • Qualification • Deposits • Availability of Plans and Specs • Bidding Period • Instruction to Bidders • Preliminary conditions • Jobsite Visit • Bid invitations

  6. Estimating and Bidding • Quantity Surveys / Takeoffs • Architect / engineer • Contractor • Professional Quantity Surveyors • Cost Summaries fig 5.4 / 5.5 • Material costs • Direct labor cost • Indirect labor costs

  7. Estimating and Bidding • Equipment Costs • Equipment Expense • Equipment Rates • Ownership and Operating Costs • A = C(n+1) + S(n-1) / 2n • Equipment production rates

  8. Estimating and Bidding • Subcontractor bids • Bid Depositories • Allowances • Overhead • General Overhead • Project Time Schedule • Markup 5 – 20

  9. Estimating and Bidding • Lump-sum Recap Sheet • Bid Changes • Change sheet • Unit price recap sheet • Factor • Contract Bond • Surety • Performance or payment bond • Addenda

  10. Estimating and Bidding • Scope Bidding • Computer-Based Estimating • Range estimating