Calculate Budget at Completion

How to Calculate Budget at Completion

Budget at Completion (BAC) is a key concept in Earned Value Analysis for effective project management. BAC represents the original project budget and is essential for tracking and controlling project costs against the baseline. Understanding how to calculate BAC accurately is critical. There are three main techniques used to determine BAC: analogous estimation, expert judgment, and parametric estimation.

Analogous Estimation

Analogous estimation involves matching a project’s tasks and deliverables with those of a similar previously completed project. By using the actual costs from the matched project, project managers can estimate the BAC for the current project. This technique is especially useful when precise data on the new project is limited and there is a closely related project to reference.

Expert Judgment

This technique relies on the knowledge and experience of experts who are familiar with the necessary components of the project. These experts or subject matter experts provide estimates based on their understanding of the project’s scope and resource requirements. Expert judgment is particularly valuable when project-specific data is scarce or when the project is unique.

Parametric Estimation

Parametric estimation breaks down the project into more manageable sub-components. Each component is then quantified using specific equations to calculate the associated costs. For example, using the formula E = nb of interviews * 10 minutes for a task involving multiple interviews, the total effort and cost implications can be derived. This method provides a high level of accuracy in estimating BAC when standard parameters are applicable.

The calculated BAC can be summarized as BAC = ∑ (budget of each work component), ensuring that all aspects of the work to be performed are accounted for in the budget forecast. By incorporating these methodologies, project managers can establish a robust baseline for their project's financial plan and monitoring.

How to Calculate Budget at Completion

Calculating the Budget at Completion (BAC) is a crucial part of project management that ensures financial tracking and aids in performance analysis. BAC represents the total originally estimated budget necessary to complete a project. It's vital for successful Earned Value Management (EVM) and managing project costs effectively.

Analogous Estimation

Utilize Analogous Estimation to forecast your BAC by matching your current project’s tasks and deliverables to those of a similar, previously completed project. Use the actual costs from the similar project as a base to determine your project’s BAC, thereby incorporating real-world data into your project planning.

Expert Judgment

Incorporate Expert Judgment in your BAC calculation by consulting with experts and experienced professionals who have a deep understanding of the scope and nature of the project. Their knowledge in costing similar projects provides valuable insights and enhances the accuracy of your BAC estimate.

Parametric Estimation

Apply Parametric Estimation by decomposing your project into smaller, manageable components and applying statistical models that relate historical data to these components. This method takes advantage of established mathematical relationships in budgeting and costing, ensuring a robust BAC calculation.

BAC, as the original project budget, serves as a baseline against which project performance can be measured. Using BAC along with Planned Value provides insight into whether project spending is on track with initial expectations, facilitating proactive management of project finances.

Examples of Calculating Budget at Completion (BAC)

Example 1: Standard Project Forecasting

To calculate the BAC for a straightforward project where the original budgetary estimates remain valid, use the initially planned budget. If the original estimate projected the total cost at $100,000 , the BAC is simply $100,000 .

Example 2: Adjusting for Cost Performance

If the project is underway and you have incurred costs and cost performance index (CPI), adjust BAC accordingly. Suppose the earned value (EV) of the work done is $40,000 but the actual cost (AC) is $50,000 . The CPI is calculated as EV divided by AC, yielding 0.8 . If the original BAC was $100,000 , the new forecasted BAC can be estimated by dividing the original BAC by the CPI: $100,000 / 0.8 = $125,000 .

Example 3: Integrating Schedule Performance

In addition to cost, schedule variances might affect the completion budget. Consider a project with an original BAC of $200,000 , a schedule performance index (SPI) of 0.9 , and an estimated cost to complete (ETC) of activities delayed or extended calculated at $30,000 . Multiply ETC by SPI, then add to the original BAC to recalibrate: ($30,000 * 0.9) + $200,000 = $227,000 .

Example 4: Incorporating Changes in Scope

If the scope of a project expands, adjustments to BAC are necessary. Suppose a new phase is added costing an additional $50,000 . If the original BAC was $150,000 , add the additional cost to compute the new BAC: $150,000 + $50,000 = $200,000 .

Example 5: Using Historical Data for Similar Projects

When precise current project data is unavailable, use historical data from similar past projects to estimate BAC. If similar projects had an average total cost of $120,000 , and considering similar scope and conditions, set the BAC at $120,000 .

Discover the Power of Sourcetable for Budgeting

Efficient Budget Calculations

Calculating your Budget at Completion (BAC) is crucial in project management and financial planning. Sourcetable, with its AI-powered capabilities, simplifies this process exceptionally. By directly asking the AI assistant "how to calculate budget at completion," users receive not only the precise calculation but also a detailed explanation of the process.

AI-Powered Precision

Sourcetable leverages advanced AI technology to ensure accuracy and reliability in calculations. When users input data related to project costs and completion rates, Sourcetable's AI quickly processes this information. The results are displayed in an easy-to-understand spreadsheet format, providing clear insights into budget management.

Interactive Learning and Problem-Solving

Whether you’re a student, a professional, or just someone looking to manage personal finances, Sourcetable serves as an educational tool as well. Alongside performing calculations, the platform’s chat interface explains the methods used, enhancing your understanding and skills in budget management.

Through its combination of AI precision and interactive features, Sourcetable proves to be an indispensable tool for calculating and managing budgets effectively.