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How BAC Is Calculated

Review how the Use Version 2 Cost Calculation Method on the Cost Tab of the Project Properties dialog box affects the way BAC is calculated.

Labor Quantity

This value represents the total number of labor resource units budgeted for the project. The Labor Quantity BAC for the project is stored in the BAC_QTY field of the Project table.

The calculations that are performed at the activity level depend on whether the Use Version 2 Cost Calculation Method option is selected on this tab of the Project Properties dialog box.

  • By default, the Use Version 2 Cost Calculation Method option is cleared for new projects. In this mode, Open Plan calculates the Labor Quantity BAC by summing the values in the RES_USED field for labor resources assigned to this activity for the Performance Measurement Baseline (PMB) in the baseline usage table. By always using the PMB when it is available, Open Plan provides consistency and reliability.
  • If there is no baseline named PMB, Open Plan uses the currently selected baseline, or, in the case of multiple selected baselines, the baseline identified as Baseline 1. If the project contains baselines, but none is selected or named PMB, Open Plan prompts you to select a baseline. If the project has no baselines, Open Plan uses the Version 2 Cost Calculation Method option automatically. A baseline must be selected in order for Open Plan to calculate earned value.
  • If the Use Version 2 Cost Calculation Method is selected, Open Plan calculates this value by summing the values in the Level field of the Assignment table adjusted for any curve, offset, or period that may be defined.

Labor Cost

This value represents the total cost of labor budgeted for the project. The Labor Cost BAC for the project is stored in the BAC_LAB field of the Project table. This value is calculated by summing the values in the BAC_LAB field of the Activity table.

The calculations that are performed at the activity level depend on whether the Use Version 2 Cost Calculation Method option is selected on this tab of the Project Properties dialog box.

  • By default, the Use Version 2 Cost Calculation Method option is cleared for new projects. In this mode, Open Plan calculates Labor Cost BAC by summing the values in either the unescalated labor resource cost field (RES_CST) or the escalated labor resource cost field (RES_ESC) in the Performance Measurement Baseline (PMB) of the Baseline Usage table. The value that Open Plan uses in this calculation is determined by a setting on the Cost Calculations dialog box:
    • If the Use Resource Cost Escalation option is cleared on the Cost Calculations dialog box, Open Plan uses the RES_CST field.
    • If the Use Resource Cost Escalation option is selected on the Cost Calculations dialog box, Open Plan uses the RES_ESC field.

    By always using the PMB when it is available, Open Plan provides consistency and reliability. If there is no baseline named PMB, Open Plan uses the currently selected baseline, or, in the case of multiple selected baselines, the baseline identified as Baseline 1. If the project contains baselines, but none is selected or named PMB, Open Plan prompts you to select a baseline. If the project has no baselines, Open Plan uses the Version 2 Cost Calculation Method option automatically. A baseline must be selected in order for Open Plan to calculate earned value.

  • If the Use Version 2 Cost Calculation Method option is selected, Open Plan calculates this value by summing the values in the Level field of the Assignment table adjusted for any curve, offset, and period that may be defined, and multiplying this value by the appropriate Labor Cost rate. The rate that Open Plan uses is determined by a setting on the Cost Calculations dialog box:
    • If the Use Resource Cost Escalation option is cleared on the Cost Calculations dialog box, Open plan uses the unit rate for all entries.
    • If the Use Resource Cost Escalation option is selected on the Cost Calculations dialog box, Open Plan uses the relevant escalated rates for each entry.

Material Cost

This value represents the total cost of materials budgeted for the project. The Material Cost BAC for the project is stored in the BAC_MAT field of the Project table. This value is calculated by summing the values in the BAC_MAT field of the Activity table.

The calculations that are performed at the activity level depend on whether the Use Version 2 Cost Calculation Method option is selected on this tab of the Project Properties dialog box.

  • By default, the Use Version 2 Cost Calculation Method option is cleared for new projects. In this mode, Open Plan calculates Material Cost BAC by summing the values in either the unescalated material resource cost field (RES_CST) or the escalated material resource cost field (RES_ESC) in the Performance Measurement Baseline (PMB) of the Baseline Usage table. The value that Open Plan uses in this calculation is determined by a setting on the Cost Calculations dialog box:
    • If the Use Resource Cost Escalation option is cleared on the Cost Calculations dialog box, Open Plan uses the RES_CST field.
    • If the Use Resource Cost Escalation option is selected on the Cost Calculations dialog box, Open Plan uses the RES_ESC field.

    By always using the PMB when it is available, Open Plan provides consistency and reliability. If there is no baseline named PMB, Open Plan uses the currently selected baseline, or, in the case of multiple selected baselines, the baseline identified as Baseline 1. If the project contains baselines, but none is selected or named PMB, Open Plan prompts you to select a baseline. If the project has no baselines, Open Plan uses the Version 2 Cost Calculation Method option automatically. A baseline must be selected in order for Open Plan to calculate earned value.

  • If the Use Version 2 Cost Calculation Method option is selected, Open Plan calculates this value by summing the values in the Level field of the Assignment table adjusted for any curve, offset, and period that may be defined, and multiplying this value by the appropriate Material Cost rate. The rate that Open Plan uses is determined by a setting on the Cost Calculations dialog box:
    • If the Use Resource Cost Escalation option is cleared on the Cost Calculations dialog box, Open plan uses the unit rate for all entries.
    • If the Use Resource Cost Escalation option is selected on the Cost Calculations dialog box, Open Plan uses the relevant escalated rates for each entry.

ODC (Other Direct Costs)

This value represents the total of Other Direct Costs (ODC) budgeted for the project. The ODC Cost BAC for the project is stored in the BAC_ODC field of the Project table. This value is calculated by summing the values in the BAC_ODC field of the Activity table.

The calculations that are performed at the activity level depend on whether the Use Version 2 Cost Calculation Method option is selected on this tab of the Project Properties dialog box.

  • By default, the Use Version 2 Cost Calculation Method option is cleared for new projects. In this mode, Open Plan calculates the ODC BAC by summing the values in either the unescalated ODC cost field (RES_CST) or the escalated ODC cost field (RES_ESC) for the Performance Measurement Baseline (PMB) in the Baseline Usage table. The value that Open Plan uses in this calculation is determined by a setting on the Cost Calculations dialog box:
    • If the Use Resource Cost Escalation option is cleared on the Cost Calculations dialog box, Open Plan uses the RES_CST field.
    • If the Use Resource Cost Escalation option is selected on the Cost Calculations dialog box, Open Plan uses the RES_ESC field.

    By always using the PMB when it is available, Open Plan provides consistency and reliability. If there is no baseline named PMB, Open Plan uses the currently selected baseline, or, in the case of multiple selected baselines, the baseline identified as Baseline 1. If the project contains baselines, but none is selected or named PMB, Open Plan prompts you to select a baseline. If the project has no baselines, Open Plan uses the Version 2 Cost Calculation Method option automatically. A baseline must be selected in order for Open Plan to calculate earned value.

  • If the Use Version 2 Cost Calculation Method option is selected, Open Plan calculates this value by summing the values in the Level field of the Assignment table adjusted for any curve, offset, and period that may be defined, and multiplying this value by the appropriate rate. The rate that Open Plan uses is determined by a setting on the Cost Calculations dialog box:
    • If the Use Resource Cost Escalation option is cleared on the Cost Calculations dialog box, Open plan uses the unit rate for all entries.
    • If the Use Resource Cost Escalation option is selected on the Cost Calculations dialog box, Open Plan uses the relevant escalated rates for each entry.

Subcontract Cost

This value represents the total subcontract costs budgeted for the project. The Subcontract Cost BAC for the project is stored in the BAC_SUB field of the Project table. This value is calculated by summing the values in the BAC_SUB field of the Activity table.

The calculations that are performed at the activity level depend on whether the Use Version 2 Cost Calculation Method option is selected on this tab of the Project Properties dialog box.

  • By default, the Use Version 2 Cost Calculation Method option is cleared for new projects. In this mode, Open Plan calculates the Subcontract Cost BAC by summing the values in either the unescalated subcontract cost field (RES_CST) or the escalated subcontract cost field (RES_ESC) for the Performance Measurement Baseline (PMB) in the Baseline Usage table. The field that Open Plan uses in this calculation is determined by a setting on the Cost Calculations dialog box:
    • If the Use Resource Cost Escalation option is cleared on the Cost Calculations dialog box, Open Plan uses the RES_CST field.
    • If the Use Resource Cost Escalation option is selected on the Cost Calculations dialog box, Open Plan uses the RES_ESC field.

    By always using the PMB when it is available, Open Plan provides consistency and reliability. If there is no baseline named PMB, Open Plan uses the currently selected baseline, or, in the case of multiple selected baselines, the baseline identified as Baseline 1. If the project contains baselines, but none is selected or named PMB, Open Plan prompts you to select a baseline. If the project has no baselines, Open Plan uses the Version 2 Cost Calculation Method option automatically. A baseline must be selected in order for Open Plan to calculate earned value.

  • If the Use Version 2 Cost Calculation Method option is selected, Open Plan calculates this value by summing the values in the Level field of the Assignment table adjusted for any curve, offset, and period that may be defined, and multiplying this value by the appropriate rate. The rate that Open Plan uses is determined by a setting on the Cost Calculations dialog box:
    • If the Use Resource Cost Escalation option is cleared on the Cost Calculations dialog box, Open plan uses the unit rate for all entries.
    • If the Use Resource Cost Escalation option is selected on the Cost Calculations dialog box, Open Plan uses the relevant escalated rates for each entry.

Total Cost

The value displayed in this field represents the total of the following BAC costs for the project:

  • Labor Cost
  • Material Cost
  • ODC (Other Direct Costs)
  • Subcontract Cost

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