Chapter 5 cost estimating and bidding
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Chapter 5 Cost Estimating and Bidding. BCN 4708 Fall 2008. 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. Estimating and Bidding.

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Chapter 5 Cost Estimating and Bidding

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Chapter 5 cost estimating and bidding

Chapter 5 Cost Estimating and Bidding

BCN 4708 Fall 2008


Estimating and bidding

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


Estimating and bidding1

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


Estimating and bidding2

Estimating and Bidding

  • Bidding Procedures

    • Private

    • Public

  • Advertisement for Bids

    • Private

    • Public

    • Reporting services


Estimating and bidding3

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


Estimating and bidding4

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


Estimating and bidding5

Estimating and Bidding

  • Equipment Costs

  • Equipment Expense

  • Equipment Rates

  • Ownership and Operating Costs

    • A = C(n+1) + S(n-1) / 2n

  • Equipment production rates


Estimating and bidding6

Estimating and Bidding

  • Subcontractor bids

  • Bid Depositories

  • Allowances

  • Overhead

    • General Overhead

  • Project Time Schedule

  • Markup 5 – 20


Estimating and bidding7

Estimating and Bidding

  • Lump-sum Recap Sheet

  • Bid Changes

    • Change sheet

  • Unit price recap sheet

    • Factor

  • Contract Bond

    • Surety

    • Performance or payment bond

  • Addenda


Estimating and bidding8

Estimating and Bidding

  • Scope Bidding

  • Computer-Based Estimating

  • Range estimating


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