Baseline in Construction: Everything You Need to Know

A construction baseline is the original plan for a project’s scope, schedule, and cost. Learn the key components and how tools like Outbuild help teams stay on track.

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Key Takeaways

A construction baseline serves as the benchmark for tracking performance, managing changes, and maintaining accountability.
Tools like Outbuild simplify schedule baseline creation and monitoring, helping teams stay aligned and reducing risk throughout the project lifecycle.
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Table of contents

Before any construction project kicks off, having a solid plan is a must. A key part of that plan? The construction baseline.

What is the meaning of baseline in construction project management, and why is it so crucial? 

This guide explores the main idea of baselines in construction. It explains their purpose, components, and how they help make projects successful. Let’s break it down.

What is a Baseline in Construction?

In construction, a baseline is the original plan. It shows the main project expectations for schedule, scope, and cost.

Venn Diagram of the key elements for a baseline in construction
Schedule, Scope and Cost Baselines are crucial components to a project’s overall baseline. 

A baseline in construction serves as the standard that measures actual project progress. When changes happen (which is common in construction), the baseline shows how these changes affect the project. It also shows which adjustments you need to make to stay on track.

The Purpose of Construction Baselines

Why are baselines so critical in construction? Here are some of their primary purposes:

  • Establish Performance Standards: Baselines define what “on time” and “on budget” should look like for a specific project.
  • Enable Monitoring & Control: They allow teams to compare planned performance to actual outcomes at various stages of a project.
  • Facilitate Communication: Baselines provide stakeholders with clarity and align everyone on project expectations.

Without a well-defined baseline, projects run the risk of overspending, delays, and scope creep.

The process of project management heavily relies on effective planning, establishing baselines, and fostering team accountability. Let's dive into the key elements to a baseline in construction: schedule, scope and cost.

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The future of schedule management

Download the playbook to learn more:

  • Integrates effortlessly with Procore.
  • Designed with simplicity in mind.
  • Leverage the power of lean construction.
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The future of schedule management

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A comprehensive baseline includes three essential components:

1. Baseline Project Schedule

The schedule baseline is the project's approved timeline, outlining when tasks and milestones should be completed. It includes:

  • All tasks and activities
  • Start and end dates for each task
  • Critical paths and milestones
  • Dependencies between activities

The baseline schedule provides clarity and helps identify sequencing delays or bottlenecks. The schedule guides the project, ensuring that the team meets deadlines and tracks progress.

User Interface of several baselines saved in Outbuild. 
In Outbuild you can have unlimited number of baseline schedules

A schedule baseline, often visualized with tools like Gantt charts, is essential for tracking project timelines and milestones. A zoomed-in schedule baseline example might be setting a milestone to complete the foundation by a specific date. This allows the team to track whether subcontractors are staying on schedule or if delays require adjustments.

Construction Scheduling and planning software like Outbuild streamlines this entire process. The platform provides a robust way to establish, monitor, and adjust schedule baselines effectively.

Further, In Outbuild, the baseline schedule also serves as an effective forecasting tool. When combined with change requests, it helps compare real progress to the original plan. This lets teams quickly spot delays and inform owners about corrective actions. 

The baseline is shown as the thin blue line just below the activities in the picture.

User Interface showing the +/- days
The inclusion of "+/- days" next to activities provides a clear visual aid to track schedule changes and stay proactive.

Lastly, in Outbuild’s Analytics component, the S-Curve visual helps team members track a project's progress over time. It compares planned, adjusted, and actual performance using three key curves:

  • Baseline Curve (Blue): Shows the original project plan and expected progress over time.
  • Projected Curve (Yellow): Reflects updates to the plan due to changes like delays or scope adjustments.
  • Actual Curve (Green): Displays the real progress made, showing work completed week by week.

Together, these curves help identify deviations from the baseline plan and assess how well the project is tracking toward completion. 

Line graph showing project progress over time with three curves: a blue baseline curve for the original plan, a yellow projected curve for updated expectations, and a green actual curve for real progress. The vertical "Today" marker highlights the current date, helping teams compare planned versus actual performance.
Track Progress with Confidence: Outbuild’s Schedule S-Curve visual compares your original plan, adjusted expectations, and actual progress to help teams spot deviations early and stay on track.

2. Scope Baseline

The project scope baseline defines the work included in the project. It includes:

  • A scope statement that outlines project objectives, deliverables, and boundaries.
  • A work breakdown structure (WBS) that divides the project into smaller, manageable sections.
  • WBS Dictionary: A detailed explanation of each WBS element.

A clear scope baseline helps all team members understand what work they need to complete and prevents scope creep. Additionally, it serves as a reference point for measuring project progress and identifying potential scope changes.

User Interface showing WBS outlined visually.
Outbuild helps you visualize a WBS structure.

What is not included in the scope baseline:

  • Assumptions and constraints that may impact the project scope.
  • Detailed technical specifications or design documents.
  • Implementation details such as code or specific processes.
  • Project management plans (these are separate documents).

Understanding this helps prevent misunderstandings or conflicts later. It also makes sure everyone knows their roles and responsibilities in the project.

The assumptions and constraints section outlines any factors that may limit or influence the project scope. These can include budget limitations, resource availability, or any external dependencies.

3. Cost Baseline

The cost baseline is the approved budget for the project, structured in alignment with the schedule. It includes:

  • Resource costs (materials, labor, and equipment)
  • Contingency reserves for unexpected expenses
  • Project overhead and administrative costs

The projected baseline for cost ensures that spending stays within limits while accounting for potential surprises. Monitoring and managing changes to the cost baseline is important in project management.

Outbuild can also help your project team track construction costs. The construction scheduling and planning software simplifies budgeting by connecting cost tracking to project progress. Your team can track real expenses and compare them to the budget. 

User Interface showing Cost Tracking in Outbuild
Your Cost Earned metrics update automatically as you log activities, keeping you on track with your job costs.

Factors Influencing the Cost Baseline

As with any aspect of a project, there are several factors that can influence the cost baseline. Some of these include:

  • Budget limits: The total budget for the project will determine how much the team can spend on different tasks and resources.
  • Resource availability: If some resources are in high demand or hard to find, it can raise their costs. This may change the cost baseline.
  • Project scope changes: Changes to the project scope can affect the cost baseline. This may need more resources or tasks.
  • Inflation and market conditions can affect prices. Economic factors, such as inflation rates, play a role. And, changes in the market also influence the costs of resources, materials, and services.
  • Uncertainty and risk: Unexpected events or risks during the project can raise costs. This may require changes to the cost baseline.

To manage these possible limits on the cost baseline, project managers often add a contingency to the budget.

This serves as a buffer for any unexpected expenses that may come up during a project.

1. Create a Project Baseline

Start by developing a comprehensive construction scope, schedule and cost baseline. Gather input from all stakeholders to ensure alignment.

2. Use Reliable Tools

Leverage tools like Outbuild’s scheduling software to create a schedule baseline. These platforms offer robust features for creating and managing baseline schedules in construction.

3. Save a Historical Record

Save multiple baselines so that you can track earlier versions for reference in case of disputes or for analyzing.

Unlike Microsoft Project, Outbuild lets you save unlimited baselines, allowing for better documentation.

4.Viewing and Managing Baselines

Platforms like Outbuild allow teams to actively view, manage, and edit baselines. With features like active baseline selection and historical baseline records, teams can seamlessly adjust to changing project dynamics. Learn more about viewing and managing baselines here.

1. Improved Project Tracking

By comparing real progress to the baseline, teams can spot delays, inefficiencies, or cost overruns early. Comparing Start and finish dates are just one way a teammate can track progress. This allows them to take corrective actions.

2. Stakeholder Alignment

Baselines create a shared understanding of project expectations, fostering better communication and collaboration among stakeholders.

3. Enhanced Change Management

When changes occur, baselines help quantify their impact on the project’s scope, schedule, and budget. This visibility enables smarter decision-making and resource allocation.

4. Reduced Risks

Regularly revisiting baselines in a project allows teams to address risks proactively, such as budget overruns or schedule delays.

5. Optimized Resource Allocation

We can improve how we use resources. This includes labor, equipment, and materials. We do this by aligning tasks and orders with the baseline schedule and tracking the schedule actively.

Construction projects are complex, with countless moving parts requiring precise coordination. Baselines are essential for making informed decisions. They help teams stay on track, within budget, and focused on project goals.

By regularly setting and reviewing the schedule, scope, and cost baselines, you build a strong foundation for your project. This keeps all stakeholders informed and aligned—from a high level down to the finer details.

A baseline in project management shows if the project is on schedule or falling behind. They also help you see how changes to one task can affect other tasks that depend on it.

Superintendent at Taurus Builders
“The ability to update a single task's duration or start date within the lookahead and observe the automatic adjustment of related task dates on the master schedule enables precise and confident communication of schedule timelines to project teams and subcontractors.” – Chris Moss, Superintendent at Taurus Builders.


Click here to watch how the team at Taurus Builders leverages Outbuild.

This connection highlights the need for careful planning. It helps teams manage transitions and keep the project running smoothly.

Book a demo or start a free trial today to see how easy it is to create a baseline in construction. Your start date to proper baselining can be as early as today.

Decorative image of the CD Playbook asset

The future of schedule management

Download the playbook to learn more:

  • Integrates effortlessly with Procore.
  • Designed with simplicity in mind.
  • Leverage the power of lean construction.
We'll be emailing you shortly with a link for you to download your asset.
Oops! Something went wrong while submitting the form.

The future of schedule management

Decorative image of the CD Playbook asset
We'll be emailing you shortly with a link for you to download your asset.
Oops! Something went wrong while submitting the form.

A comprehensive baseline includes three essential components:

1. Baseline Project Schedule

The schedule baseline is the project's approved timeline, outlining when tasks and milestones should be completed. It includes:

  • All tasks and activities
  • Start and end dates for each task
  • Critical paths and milestones
  • Dependencies between activities

The baseline schedule provides clarity and helps identify sequencing delays or bottlenecks. The schedule guides the project, ensuring that the team meets deadlines and tracks progress.

User Interface of several baselines saved in Outbuild. 
In Outbuild you can have unlimited number of baseline schedules

A schedule baseline, often visualized with tools like Gantt charts, is essential for tracking project timelines and milestones. A zoomed-in schedule baseline example might be setting a milestone to complete the foundation by a specific date. This allows the team to track whether subcontractors are staying on schedule or if delays require adjustments.

Construction Scheduling and planning software like Outbuild streamlines this entire process. The platform provides a robust way to establish, monitor, and adjust schedule baselines effectively.

Further, In Outbuild, the baseline schedule also serves as an effective forecasting tool. When combined with change requests, it helps compare real progress to the original plan. This lets teams quickly spot delays and inform owners about corrective actions. 

The baseline is shown as the thin blue line just below the activities in the picture.

User Interface showing the +/- days
The inclusion of "+/- days" next to activities provides a clear visual aid to track schedule changes and stay proactive.

Lastly, in Outbuild’s Analytics component, the S-Curve visual helps team members track a project's progress over time. It compares planned, adjusted, and actual performance using three key curves:

  • Baseline Curve (Blue): Shows the original project plan and expected progress over time.
  • Projected Curve (Yellow): Reflects updates to the plan due to changes like delays or scope adjustments.
  • Actual Curve (Green): Displays the real progress made, showing work completed week by week.

Together, these curves help identify deviations from the baseline plan and assess how well the project is tracking toward completion. 

Line graph showing project progress over time with three curves: a blue baseline curve for the original plan, a yellow projected curve for updated expectations, and a green actual curve for real progress. The vertical "Today" marker highlights the current date, helping teams compare planned versus actual performance.
Track Progress with Confidence: Outbuild’s Schedule S-Curve visual compares your original plan, adjusted expectations, and actual progress to help teams spot deviations early and stay on track.

2. Scope Baseline

The project scope baseline defines the work included in the project. It includes:

  • A scope statement that outlines project objectives, deliverables, and boundaries.
  • A work breakdown structure (WBS) that divides the project into smaller, manageable sections.
  • WBS Dictionary: A detailed explanation of each WBS element.

A clear scope baseline helps all team members understand what work they need to complete and prevents scope creep. Additionally, it serves as a reference point for measuring project progress and identifying potential scope changes.

User Interface showing WBS outlined visually.
Outbuild helps you visualize a WBS structure.

What is not included in the scope baseline:

  • Assumptions and constraints that may impact the project scope.
  • Detailed technical specifications or design documents.
  • Implementation details such as code or specific processes.
  • Project management plans (these are separate documents).

Understanding this helps prevent misunderstandings or conflicts later. It also makes sure everyone knows their roles and responsibilities in the project.

The assumptions and constraints section outlines any factors that may limit or influence the project scope. These can include budget limitations, resource availability, or any external dependencies.

3. Cost Baseline

The cost baseline is the approved budget for the project, structured in alignment with the schedule. It includes:

  • Resource costs (materials, labor, and equipment)
  • Contingency reserves for unexpected expenses
  • Project overhead and administrative costs

The projected baseline for cost ensures that spending stays within limits while accounting for potential surprises. Monitoring and managing changes to the cost baseline is important in project management.

Outbuild can also help your project team track construction costs. The construction scheduling and planning software simplifies budgeting by connecting cost tracking to project progress. Your team can track real expenses and compare them to the budget. 

User Interface showing Cost Tracking in Outbuild
Your Cost Earned metrics update automatically as you log activities, keeping you on track with your job costs.

Factors Influencing the Cost Baseline

As with any aspect of a project, there are several factors that can influence the cost baseline. Some of these include:

  • Budget limits: The total budget for the project will determine how much the team can spend on different tasks and resources.
  • Resource availability: If some resources are in high demand or hard to find, it can raise their costs. This may change the cost baseline.
  • Project scope changes: Changes to the project scope can affect the cost baseline. This may need more resources or tasks.
  • Inflation and market conditions can affect prices. Economic factors, such as inflation rates, play a role. And, changes in the market also influence the costs of resources, materials, and services.
  • Uncertainty and risk: Unexpected events or risks during the project can raise costs. This may require changes to the cost baseline.

To manage these possible limits on the cost baseline, project managers often add a contingency to the budget.

This serves as a buffer for any unexpected expenses that may come up during a project.

1. Create a Project Baseline

Start by developing a comprehensive construction scope, schedule and cost baseline. Gather input from all stakeholders to ensure alignment.

2. Use Reliable Tools

Leverage tools like Outbuild’s scheduling software to create a schedule baseline. These platforms offer robust features for creating and managing baseline schedules in construction.

3. Save a Historical Record

Save multiple baselines so that you can track earlier versions for reference in case of disputes or for analyzing.

Unlike Microsoft Project, Outbuild lets you save unlimited baselines, allowing for better documentation.

4.Viewing and Managing Baselines

Platforms like Outbuild allow teams to actively view, manage, and edit baselines. With features like active baseline selection and historical baseline records, teams can seamlessly adjust to changing project dynamics. Learn more about viewing and managing baselines here.

1. Improved Project Tracking

By comparing real progress to the baseline, teams can spot delays, inefficiencies, or cost overruns early. Comparing Start and finish dates are just one way a teammate can track progress. This allows them to take corrective actions.

2. Stakeholder Alignment

Baselines create a shared understanding of project expectations, fostering better communication and collaboration among stakeholders.

3. Enhanced Change Management

When changes occur, baselines help quantify their impact on the project’s scope, schedule, and budget. This visibility enables smarter decision-making and resource allocation.

4. Reduced Risks

Regularly revisiting baselines in a project allows teams to address risks proactively, such as budget overruns or schedule delays.

5. Optimized Resource Allocation

We can improve how we use resources. This includes labor, equipment, and materials. We do this by aligning tasks and orders with the baseline schedule and tracking the schedule actively.

Construction projects are complex, with countless moving parts requiring precise coordination. Baselines are essential for making informed decisions. They help teams stay on track, within budget, and focused on project goals.

By regularly setting and reviewing the schedule, scope, and cost baselines, you build a strong foundation for your project. This keeps all stakeholders informed and aligned—from a high level down to the finer details.

A baseline in project management shows if the project is on schedule or falling behind. They also help you see how changes to one task can affect other tasks that depend on it.

Superintendent at Taurus Builders
“The ability to update a single task's duration or start date within the lookahead and observe the automatic adjustment of related task dates on the master schedule enables precise and confident communication of schedule timelines to project teams and subcontractors.” – Chris Moss, Superintendent at Taurus Builders.


Click here to watch how the team at Taurus Builders leverages Outbuild.

This connection highlights the need for careful planning. It helps teams manage transitions and keep the project running smoothly.

Book a demo or start a free trial today to see how easy it is to create a baseline in construction. Your start date to proper baselining can be as early as today.

Lee Evans
Ashley Greybar
Senior Marketing Manager
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