The Project's Integrated Baseline: Scope, Schedule, and Cost Baselines

PMBOK v8 Definition

The project's integrated baseline is the combination of the scope baseline, schedule baseline, and cost baseline, which together serve as the approved reference point for measuring, managing, and controlling project performance. According to PMBOK v8, "taken together, the baselines for schedule, cost, and scope are referred to as the project's integrated baseline." The scope baseline is the approved version of formal scope documents that can be changed using formal change control procedures and is used as the basis for comparison to actual results, potentially including the approved scope statement, work breakdown structure (WBS), and WBS dictionary.

Why It Matters for the Exam

This concept appears frequently in PMI exam questions related to project performance measurement, earned value management (EVM), and change control. You will encounter it in situational questions where a project manager needs to determine what constitutes the approved plan for measuring variances, as well as in definition-style questions testing your understanding of baseline integration and the components of the project management plan.

Key Points to Remember (for the exam)

• Three Core Components: The integrated baseline consists of exactly three baselines: scope, schedule, and cost. No other baselines (such as quality or risk) are part of this specific integration.

• Scope Baseline Contents: The scope baseline may include the approved version of a scope statement, work breakdown structure (WBS), and its associated WBS dictionary.

• Schedule Baseline Relationship: The schedule baseline, together with the cost baseline, are determined according to the scope that should be delivered. This establishes the foundational sequence: scope first, then schedule and cost.

• Performance Measurement Purpose: The measurement baseline includes the integrated scope, schedule, and cost baselines used for comparison to manage, measure, and control project execution.

• Change Control Requirement: All baselines can only be changed using formal change control procedures. Any update to the schedule baseline, cost baseline, or scope baseline requires a formal change request.

• Adaptive Approach Consideration: In adaptive approaches, work is reviewed periodically, often in a timeboxed cadence, so that feedback can be incorporated as the integrated baseline evolves.

• Common Confusion: Do not confuse the integrated baseline with the project management plan. The integrated baseline is a component of the project management plan, not the entire plan itself.

Typical PMI Exam Example

A project manager is reviewing the approved project documents and needs to establish the reference point against which all future performance will be measured. The project has an approved scope statement, WBS, WBS dictionary, schedule with milestone dates, and a budget. Which document represents the complete set of baselines the project manager should use?

Answer: The integrated baseline, which combines the scope baseline, schedule baseline, and cost baseline.

PMI Exam Traps

• Trap: Thinking the project management plan is the same as the integrated baseline. Reality: The integrated baseline is a component of the project management plan, not the entire plan.

• Trap: Including additional baselines (quality, risk, resources) in the integrated baseline definition. Reality: The integrated baseline specifically refers only to scope, schedule, and cost baselines.

• Trap: Confusing the scope baseline with only the scope statement. Reality: The scope baseline may include the scope statement, WBS, and WBS dictionary.

• Trap: Assuming baselines are fixed and never change. Reality: Baselines can be updated through formal change control procedures when significant changes occur.

Important PMI Connections

Quick Review Questions

1. What three specific baselines combine to form the project's integrated baseline?

2. When a project uses an adaptive approach, how does the integrated baseline evolve differently compared to a predictive approach?

3. Can the schedule baseline be updated without a formal change request? Why or why not?

4. What documents may be included in the scope baseline component of the integrated baseline?

5. How does the relationship between scope, schedule, and cost baselines establish the sequence of project planning?

PMBOK v8 Reference

Section 4 – Inputs and Outputs (Page 140) - A Guide to the Project Management Body of Knowledge