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BOCC Implementation Details Three Baskets Residential Sector Non-residential Sector Civil Engineering Works Systems for Residential Sector Systems for Non-residential Sector Systems for Civil Engineering Former Hierarchy BOCC Hierarchy Residential Basket Construction Components

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Three baskets l.jpg
Three Baskets

Basket of Construction Components (Walsh and Sawhney)


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Residential Sector

Basket of Construction Components (Walsh and Sawhney)


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Non-residential Sector

Basket of Construction Components (Walsh and Sawhney)


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Civil Engineering Works

Basket of Construction Components (Walsh and Sawhney)


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Systems for Residential Sector

Basket of Construction Components (Walsh and Sawhney)


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Systems for Non-residential Sector

Basket of Construction Components (Walsh and Sawhney)


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Systems for Civil Engineering

Basket of Construction Components (Walsh and Sawhney)


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Former Hierarchy

Basket of Construction Components (Walsh and Sawhney)


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BOCC Hierarchy

Basket of Construction Components (Walsh and Sawhney)


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Residential Basket

Basket of Construction Components (Walsh and Sawhney)


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Construction Components

Basket of Construction Components (Walsh and Sawhney)


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Construction Components

Basket of Construction Components (Walsh and Sawhney)


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Construction Components

Basket of Construction Components (Walsh and Sawhney)


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Construction Components

Basket of Construction Components (Walsh and Sawhney)



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Overview of Price Collection

  • BOCC uses the SPD/PS methodology for price collection

  • Identified components are representative and comparable

  • Components are converted into SPDs for price collection purposes

Basket of Construction Components (Walsh and Sawhney)


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Overview of Price Collection

  • Country resources such as public works department and published schedule of rates can be used for pricing

  • Countries will be required to price 40 components

  • BOCC methodology can also be adopted for inter-temporal price index

Basket of Construction Components (Walsh and Sawhney)


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Example Component Pricing

Basket of Construction Components (Walsh and Sawhney)


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Sample SPD

Basket of Construction Components (Walsh and Sawhney)







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100

200

300

350

Use of SPD

Example: 1 lane-km of asphalt paving. Cross section is shown.

Curb/Gutter – typical (price of this item not included in component price)

4000

AC Wearing Course

AC Binder Layer

Base Course

Subbase

Compacted Subgrade (price of this item not included in component price)

Basket of Construction Components (Walsh and Sawhney)


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Expert input will be needed to obtain

1. The labor mix.

2. The equipment mix.

The remaining unit costs can come from construction experts, but they can also be updated using standard methods.

The labor and equipment mix and hours need only be updated on the time scale of productivity and method changes.

Basket of Construction Components (Walsh and Sawhney)



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Expenditure Weights in BOCC

Basket of Construction Components (Walsh and Sawhney)


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Expenditure Weights

  • W1—for aggregation of residential, non-residential and civil engineering baskets

  • W2—for aggregation of systems

  • W3—for inclusion of labor productivity and labor/equipment tradeoff

  • W1 already available and W3 designed into BOCC

Basket of Construction Components (Walsh and Sawhney)


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Sample System Weight (W2)

Table 7: Cost Breakdown for Construction in Canada for Year 2000 (Source: Hanscomb 2000)

Basket of Construction Components (Walsh and Sawhney)


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Determination of W2

  • Determined at country level

  • Historical construction project pricing information needed

  • Key goal is to determine percentage breakdown by system type

  • Needed for each basket (residential, non-residential, and civil engineering)

Basket of Construction Components (Walsh and Sawhney)



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